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1233 vulnerabilities by linuxfoundation
CVE-2026-106558 (GCVE-0-2026-106558)
Vulnerability from nvd – Published: 2026-10-07 14:45 – Updated: 2026-10-10 02:27
VLAI
EPSS
VEX
Title
Backstage: Improper validation of TechDocs MkDocs configuration
Summary
Backstage is an open framework for building developer portals. Prior to 1.14.8, 1.15.6, and 2.0.1, the @backstage/plugin-techdocs-node package improperly validated mapping-style markdown_extensions configuration. An authenticated attacker who can register or influence an SCM-backed documentation source may bypass TechDocs sanitization and cause Python objects to be imported and instantiated in the generator runtime, leading to arbitrary code execution. Earlier fixes in versions 1.14.6 and 1.15.4 did not fully address the supported mapping representation of markdown_extensions. Impact is greatest when documentation generation runs with backend credentials, filesystem access, or internal network access. This issue is fixed in versions 1.14.8, 1.15.6, and 2.0.1.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-10 02:27 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/327… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/944… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/f18… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.50.7
Affected: >= 1.51.0-next.0, < 1.54.9 Affected: >= 1.55.0-next.0, < 1.55.2 |
|
| @backstage | plugin-techdocs-node |
Affected:
< 1.14.8
Affected: >= 1.15.0, < 1.15.6 Affected: >= 2.0.0, < 2.0.1 |
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CVE-2026-106556 (GCVE-0-2026-106556)
Vulnerability from nvd – Published: 2026-10-07 14:39 – Updated: 2026-10-07 16:16
VLAI
EPSS
VEX
Title
Backstage: Configuration bypass in TechDocs mkdocs.yml sanitization
Summary
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by configuration bypass in techdocs mkdocs.yml sanitization. Insufficient validation of MkDocs configuration during TechDocs generation could allow an authenticated user who can register or modify documentation sources to execute arbitrary commands in the build environment. Impact is limited to resources accessible to the TechDocs backend or build container. This issue is fixed in versions 1.14.6 and 1.15.4.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 16:15 UTC
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/251… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/b6d… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.50.5
Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-techdocs-node |
Affected:
< 1.14.6
Affected: >= 1.15.0, < 1.15.4 |
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CVE-2026-106510 (GCVE-0-2026-106510)
Vulnerability from nvd – Published: 2026-10-07 14:36 – Updated: 2026-10-07 17:15
VLAI
EPSS
VEX
Title
Backstage: Remote code execution via crafted markdown_extensions in TechDocs mkdocs.yml
Summary
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by remote code execution via crafted markdown_extensions in techdocs mkdocs.yml. An authenticated user who can register catalog entities can provide a crafted mkdocs.yml causing arbitrary OS command execution on the TechDocs build host when the docs are built. This issue is fixed in versions 1.14.6 and 1.15.4.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 17:13 UTC
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/02c… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/a90… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.50.5
Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-techdocs-node |
Affected:
< 1.14.6
Affected: >= 1.15.0, < 1.15.4 |
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CVE-2026-106509 (GCVE-0-2026-106509)
Vulnerability from nvd – Published: 2026-10-06 21:50 – Updated: 2026-10-07 18:01
VLAI
EPSS
VEX
Title
Backstage: Improper validation of MkDocs theme configuration in TechDocs
Summary
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs theme configuration in techdocs. When TechDocs is configured to build documentation locally or in a container, a user with write access to a registered repository can include configuration values in mkdocs.yml that cause arbitrary code execution during the documentation build process. This issue is fixed in versions 1.14.6 and 1.15.4.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 18:01 UTC
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/02c… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/a90… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.50.5
Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-techdocs-node |
Affected:
< 1.14.6
Affected: >= 1.15.0, < 1.15.4 |
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CVE-2026-106508 (GCVE-0-2026-106508)
Vulnerability from nvd – Published: 2026-10-06 21:47 – Updated: 2026-10-09 01:56
VLAI
EPSS
VEX
Title
Backstage: Potential file exposure through local TechDocs publisher
Summary
Backstage is an open framework for building developer portals. Prior to 1.15.4, the @backstage/plugin-techdocs-node package is affected by potential file exposure through local techdocs publisher. When using the local TechDocs publisher (techdocs.publisher.type: 'local'), it was possible for the documentation serving endpoint to follow filesystem references outside the intended documentation tree, potentially exposing host files to authenticated users. This is mitigated by the fact that exploration requires preconditions that do not arise through normal MkDocs operation. Cloud-based publishers (S3, GCS, Azure Blob Storage) are not affected. This issue is fixed in version 1.15.4.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 01:56 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/6ae… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage | plugin-techdocs-node |
Affected:
< 1.15.4
|
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CVE-2026-106507 (GCVE-0-2026-106507)
Vulnerability from nvd – Published: 2026-10-06 21:46 – Updated: 2026-10-07 15:03
VLAI
EPSS
VEX
Title
Backstage: TechDocs arbitrary file read via mkdocs snippets
Summary
Backstage is an open framework for building developer portals. Prior to 1.15.4, the @backstage/plugin-techdocs-node package is affected by techdocs arbitrary file read via mkdocs snippets. Unsafe path resolution in TechDocs source tree handling allows an authenticated user who can register documentation sources to include content from outside the intended documentation boundary. Depending on deployment, this may expose files readable by the build process. This issue is fixed in version 1.15.4.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:03 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/911… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage/plugin-techdocs-node | plugin-techdocs-node |
Affected:
< 1.15.4
|
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CVE-2026-106506 (GCVE-0-2026-106506)
Vulnerability from nvd – Published: 2026-10-06 21:44 – Updated: 2026-10-07 17:06
VLAI
EPSS
VEX
Title
Backstage: Improper input validation in scaffolder task list ordering
Summary
Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by improper input validation in scaffolder task list ordering. An authenticated Backstage user with permission to create and read relevant scaffolder tasks may be able to infer confidential task data under specific conditions. Successful exploitation requires retained task secrets, visibility of a target task, knowledge of the secret structure, and repeated requests. This issue is fixed in version 4.1.0.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:27 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/e67… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 4.1.0
|
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CVE-2026-106505 (GCVE-0-2026-106505)
Vulnerability from nvd – Published: 2026-10-06 21:43 – Updated: 2026-10-07 16:14
VLAI
EPSS
VEX
Title
Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend
Summary
Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package is affected by bypass of mkdocs configuration sanitizer in techdocs backend. Users with the ability to commit changes to a repository that uses TechDocs can circumvent the MkDocs configuration file sanitizer introduced in response to CVE-2026-25153 and execute arbitrary code on the TechDocs backend host during documentation generation. This issue is fixed in versions 1.14.6 and 1.15.4.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 16:12 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/a7d… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/ef9… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.50.5
Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-techdocs-node |
Affected:
< 1.14.6
Affected: >= 1.15.0, < 1.15.4 |
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CVE-2026-106504 (GCVE-0-2026-106504)
Vulnerability from nvd – Published: 2026-10-06 21:40 – Updated: 2026-10-07 16:20
VLAI
EPSS
VEX
Title
Backstage: Sensitive information exposure in scaffolder task logs
Summary
Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder task logs. An authenticated user who can create and read scaffolder tasks may be able to observe sensitive values in task logs in deployments with restrictive action permissions and affected templates. Exploitation requires a denied action whose input contains such a value. This issue is fixed in version 4.1.0.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 16:20 UTC
CWE
- CWE-532 - Insertion of Sensitive Information into Log File
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/3eb… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 4.1.0
|
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CVE-2026-106503 (GCVE-0-2026-106503)
Vulnerability from nvd – Published: 2026-10-06 21:37 – Updated: 2026-10-09 01:55
VLAI
EPSS
VEX
Title
Backstage: Scaffolder action input authorization bypass
Summary
Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by scaffolder action input authorization bypass. An authenticated user with access to affected Scaffolder templates could bypass configured action restrictions. Depending on integration credentials, this could grant unauthorized access to repositories and related source-control resources. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 01:55 UTC
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/11c… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/a91… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/e30… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.49.6
Affected: >= 1.50.0-next.0, < 1.50.5 Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 3.3.1
Affected: >= 3.4.0, < 3.4.1 Affected: >= 4.0.0, < 4.0.3 Affected: >= 4.0.4, < 4.1.0 |
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CVE-2026-106502 (GCVE-0-2026-106502)
Vulnerability from nvd – Published: 2026-10-06 21:34 – Updated: 2026-10-07 15:09
VLAI
EPSS
VEX
Title
Backstage: Sensitive information may be exposed in Scaffolder task failure events
Summary
Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package could expose sensitive information in Scaffolder task failure events. Under specific template and failure conditions, an authenticated user may retrieve backend-managed credentials used during task execution from affected task events. This issue is fixed in version 4.1.0.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:08 UTC
CWE
- CWE-532 - Insertion of Sensitive Information into Log File
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/3f1… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 4.1.0
|
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CVE-2026-106501 (GCVE-0-2026-106501)
Vulnerability from nvd – Published: 2026-10-06 21:32 – Updated: 2026-10-07 17:06
VLAI
EPSS
VEX
Title
Backstage: Sensitive information exposure in Scaffolder
Summary
Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder. An authenticated Backstage user who can read another user's Scaffolder task may receive internal execution data. In deployments where that data contains credentials for an external service, this may permit disclosure and unauthorized changes in that external service. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:30 UTC
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/66d… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/c19… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/e26… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.49.6
Affected: >= 1.50.0-next.0, < 1.50.5 Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 3.3.1
Affected: >= 3.4.0, < 3.4.1 Affected: >= 4.0.0, < 4.0.3 Affected: >= 4.0.4, < 4.1.0 |
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CVE-2026-106500 (GCVE-0-2026-106500)
Vulnerability from nvd – Published: 2026-10-06 21:29 – Updated: 2026-10-07 15:48
VLAI
EPSS
VEX
Title
Backstage: Improper task state validation in Scaffolder backend
Summary
Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by improper task state validation in scaffolder backend. An authenticated user with permission to create and access Scaffolder tasks may, under specific timing and deployment conditions, affect files accessible to the Backstage backend. If backend application files are writable, the confidentiality, integrity, and availability of the backend may be compromised. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
Severity
8.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:47 UTC
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/0d2… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/56b… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/9e8… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.49.6
Affected: >= 1.50.0-next.0, < 1.50.5 Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 3.3.1
Affected: >= 3.4.0, < 3.4.1 Affected: >= 4.0.0, < 4.0.3 Affected: >= 4.0.4, < 4.1.0 |
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CVE-2026-106499 (GCVE-0-2026-106499)
Vulnerability from nvd – Published: 2026-10-06 21:25 – Updated: 2026-10-07 17:46
VLAI
EPSS
VEX
Title
Backstage: Secret-derived values may be exposed in scaffolder task logs
Summary
Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package could expose secret-derived values in Scaffolder task logs. Deployments that configure sensitive scaffolder.defaultEnvironment.secrets and allow an attacker to create or modify Scaffolder templates are affected. A template author could cause secret-derived values used during template iteration to be persisted and exposed to users who can access the resulting task logs. This issue is fixed in version 4.1.0.
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 17:45 UTC
CWE
- CWE-532 - Insertion of Sensitive Information into Log File
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/dc3… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 4.1.0
|
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CVE-2026-106459 (GCVE-0-2026-106459)
Vulnerability from nvd – Published: 2026-10-06 20:19 – Updated: 2026-10-07 16:24
VLAI
EPSS
VEX
Title
Backstage: Improper input validation in Sentry scaffolder actions
Summary
Backstage is an open framework for building developer portals. From 0.3.0 until 0.3.8, the @backstage/plugin-scaffolder-backend-module-sentry package is affected by improper input validation in sentry scaffolder actions. An authenticated internal user who can execute the affected actions may cause the backend to contact unintended destinations and disclose Sentry integration credentials. Subsequent impact depends on network reachability and the privileges granted to the configured token. This issue is fixed in version 0.3.8.
Severity
8.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 16:24 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/b01… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
>= 1.47.0, < 1.54.8
|
|
| @backstage | plugin-scaffolder-backend-module-sentry |
Affected:
>= 0.3.0, < 0.3.8
|
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CVE-2026-106455 (GCVE-0-2026-106455)
Vulnerability from nvd – Published: 2026-10-06 20:06 – Updated: 2026-10-09 01:46
VLAI
EPSS
VEX
Title
Backstage: Improper validation of MkDocs plugin configuration in TechDocs
Summary
Backstage is an open framework for building developer portals. From 0.11.12 until 1.14.7 and 1.15.5, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs plugin configuration in techdocs. An authenticated attacker with control over a TechDocs source repository could cause a documentation build to retrieve and publish data from network locations reachable by the build environment. Exposure depends on deployment topology, build mode, and target endpoint protections. Modern cloud metadata services that require tokens or special headers are not directly accessible through the affected behavior. This issue is fixed in @backstage/plugin-techdocs-node versions 1.14.7 and 1.15.5.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 01:46 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/28a… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/9f7… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
>= 0.71.1, < 1.50.6
Affected: >= 1.51.0-next.0, < 1.54.8 |
|
| @backstage | plugin-techdocs-node |
Affected:
>= 0.11.12, < 1.14.7
Affected: >= 1.15.0, < 1.15.5 |
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CVE-2026-106558 (GCVE-0-2026-106558)
Vulnerability from cvelistv5 – Published: 2026-10-07 14:45 – Updated: 2026-10-10 02:27
VLAI
EPSS
VEX
Title
Backstage: Improper validation of TechDocs MkDocs configuration
Summary
Backstage is an open framework for building developer portals. Prior to 1.14.8, 1.15.6, and 2.0.1, the @backstage/plugin-techdocs-node package improperly validated mapping-style markdown_extensions configuration. An authenticated attacker who can register or influence an SCM-backed documentation source may bypass TechDocs sanitization and cause Python objects to be imported and instantiated in the generator runtime, leading to arbitrary code execution. Earlier fixes in versions 1.14.6 and 1.15.4 did not fully address the supported mapping representation of markdown_extensions. Impact is greatest when documentation generation runs with backend credentials, filesystem access, or internal network access. This issue is fixed in versions 1.14.8, 1.15.6, and 2.0.1.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-10 02:27 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/327… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/944… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/f18… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.50.7
Affected: >= 1.51.0-next.0, < 1.54.9 Affected: >= 1.55.0-next.0, < 1.55.2 |
|
| @backstage | plugin-techdocs-node |
Affected:
< 1.14.8
Affected: >= 1.15.0, < 1.15.6 Affected: >= 2.0.0, < 2.0.1 |
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CVE-2026-106556 (GCVE-0-2026-106556)
Vulnerability from cvelistv5 – Published: 2026-10-07 14:39 – Updated: 2026-10-07 16:16
VLAI
EPSS
VEX
Title
Backstage: Configuration bypass in TechDocs mkdocs.yml sanitization
Summary
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by configuration bypass in techdocs mkdocs.yml sanitization. Insufficient validation of MkDocs configuration during TechDocs generation could allow an authenticated user who can register or modify documentation sources to execute arbitrary commands in the build environment. Impact is limited to resources accessible to the TechDocs backend or build container. This issue is fixed in versions 1.14.6 and 1.15.4.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 16:15 UTC
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/251… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/b6d… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.50.5
Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-techdocs-node |
Affected:
< 1.14.6
Affected: >= 1.15.0, < 1.15.4 |
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CVE-2026-106510 (GCVE-0-2026-106510)
Vulnerability from cvelistv5 – Published: 2026-10-07 14:36 – Updated: 2026-10-07 17:15
VLAI
EPSS
VEX
Title
Backstage: Remote code execution via crafted markdown_extensions in TechDocs mkdocs.yml
Summary
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by remote code execution via crafted markdown_extensions in techdocs mkdocs.yml. An authenticated user who can register catalog entities can provide a crafted mkdocs.yml causing arbitrary OS command execution on the TechDocs build host when the docs are built. This issue is fixed in versions 1.14.6 and 1.15.4.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 17:13 UTC
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/02c… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/a90… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.50.5
Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-techdocs-node |
Affected:
< 1.14.6
Affected: >= 1.15.0, < 1.15.4 |
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CVE-2026-106509 (GCVE-0-2026-106509)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:50 – Updated: 2026-10-07 18:01
VLAI
EPSS
VEX
Title
Backstage: Improper validation of MkDocs theme configuration in TechDocs
Summary
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs theme configuration in techdocs. When TechDocs is configured to build documentation locally or in a container, a user with write access to a registered repository can include configuration values in mkdocs.yml that cause arbitrary code execution during the documentation build process. This issue is fixed in versions 1.14.6 and 1.15.4.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 18:01 UTC
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/02c… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/a90… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.50.5
Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-techdocs-node |
Affected:
< 1.14.6
Affected: >= 1.15.0, < 1.15.4 |
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CVE-2026-106508 (GCVE-0-2026-106508)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:47 – Updated: 2026-10-09 01:56
VLAI
EPSS
VEX
Title
Backstage: Potential file exposure through local TechDocs publisher
Summary
Backstage is an open framework for building developer portals. Prior to 1.15.4, the @backstage/plugin-techdocs-node package is affected by potential file exposure through local techdocs publisher. When using the local TechDocs publisher (techdocs.publisher.type: 'local'), it was possible for the documentation serving endpoint to follow filesystem references outside the intended documentation tree, potentially exposing host files to authenticated users. This is mitigated by the fact that exploration requires preconditions that do not arise through normal MkDocs operation. Cloud-based publishers (S3, GCS, Azure Blob Storage) are not affected. This issue is fixed in version 1.15.4.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 01:56 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/6ae… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage | plugin-techdocs-node |
Affected:
< 1.15.4
|
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CVE-2026-106507 (GCVE-0-2026-106507)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:46 – Updated: 2026-10-07 15:03
VLAI
EPSS
VEX
Title
Backstage: TechDocs arbitrary file read via mkdocs snippets
Summary
Backstage is an open framework for building developer portals. Prior to 1.15.4, the @backstage/plugin-techdocs-node package is affected by techdocs arbitrary file read via mkdocs snippets. Unsafe path resolution in TechDocs source tree handling allows an authenticated user who can register documentation sources to include content from outside the intended documentation boundary. Depending on deployment, this may expose files readable by the build process. This issue is fixed in version 1.15.4.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:03 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/911… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage/plugin-techdocs-node | plugin-techdocs-node |
Affected:
< 1.15.4
|
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CVE-2026-106506 (GCVE-0-2026-106506)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:44 – Updated: 2026-10-07 17:06
VLAI
EPSS
VEX
Title
Backstage: Improper input validation in scaffolder task list ordering
Summary
Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by improper input validation in scaffolder task list ordering. An authenticated Backstage user with permission to create and read relevant scaffolder tasks may be able to infer confidential task data under specific conditions. Successful exploitation requires retained task secrets, visibility of a target task, knowledge of the secret structure, and repeated requests. This issue is fixed in version 4.1.0.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:27 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/e67… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 4.1.0
|
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CVE-2026-106505 (GCVE-0-2026-106505)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:43 – Updated: 2026-10-07 16:14
VLAI
EPSS
VEX
Title
Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend
Summary
Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package is affected by bypass of mkdocs configuration sanitizer in techdocs backend. Users with the ability to commit changes to a repository that uses TechDocs can circumvent the MkDocs configuration file sanitizer introduced in response to CVE-2026-25153 and execute arbitrary code on the TechDocs backend host during documentation generation. This issue is fixed in versions 1.14.6 and 1.15.4.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 16:12 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/a7d… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/ef9… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.50.5
Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-techdocs-node |
Affected:
< 1.14.6
Affected: >= 1.15.0, < 1.15.4 |
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CVE-2026-106504 (GCVE-0-2026-106504)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:40 – Updated: 2026-10-07 16:20
VLAI
EPSS
VEX
Title
Backstage: Sensitive information exposure in scaffolder task logs
Summary
Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder task logs. An authenticated user who can create and read scaffolder tasks may be able to observe sensitive values in task logs in deployments with restrictive action permissions and affected templates. Exploitation requires a denied action whose input contains such a value. This issue is fixed in version 4.1.0.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 16:20 UTC
CWE
- CWE-532 - Insertion of Sensitive Information into Log File
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/3eb… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 4.1.0
|
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CVE-2026-106503 (GCVE-0-2026-106503)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:37 – Updated: 2026-10-09 01:55
VLAI
EPSS
VEX
Title
Backstage: Scaffolder action input authorization bypass
Summary
Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by scaffolder action input authorization bypass. An authenticated user with access to affected Scaffolder templates could bypass configured action restrictions. Depending on integration credentials, this could grant unauthorized access to repositories and related source-control resources. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 01:55 UTC
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/11c… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/a91… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/e30… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.49.6
Affected: >= 1.50.0-next.0, < 1.50.5 Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 3.3.1
Affected: >= 3.4.0, < 3.4.1 Affected: >= 4.0.0, < 4.0.3 Affected: >= 4.0.4, < 4.1.0 |
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CVE-2026-106502 (GCVE-0-2026-106502)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:34 – Updated: 2026-10-07 15:09
VLAI
EPSS
VEX
Title
Backstage: Sensitive information may be exposed in Scaffolder task failure events
Summary
Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package could expose sensitive information in Scaffolder task failure events. Under specific template and failure conditions, an authenticated user may retrieve backend-managed credentials used during task execution from affected task events. This issue is fixed in version 4.1.0.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:08 UTC
CWE
- CWE-532 - Insertion of Sensitive Information into Log File
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/3f1… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 4.1.0
|
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CVE-2026-106501 (GCVE-0-2026-106501)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:32 – Updated: 2026-10-07 17:06
VLAI
EPSS
VEX
Title
Backstage: Sensitive information exposure in Scaffolder
Summary
Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder. An authenticated Backstage user who can read another user's Scaffolder task may receive internal execution data. In deployments where that data contains credentials for an external service, this may permit disclosure and unauthorized changes in that external service. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:30 UTC
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/66d… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/c19… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/e26… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.49.6
Affected: >= 1.50.0-next.0, < 1.50.5 Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 3.3.1
Affected: >= 3.4.0, < 3.4.1 Affected: >= 4.0.0, < 4.0.3 Affected: >= 4.0.4, < 4.1.0 |
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CVE-2026-106500 (GCVE-0-2026-106500)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:29 – Updated: 2026-10-07 15:48
VLAI
EPSS
VEX
Title
Backstage: Improper task state validation in Scaffolder backend
Summary
Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by improper task state validation in scaffolder backend. An authenticated user with permission to create and access Scaffolder tasks may, under specific timing and deployment conditions, affect files accessible to the Backstage backend. If backend application files are writable, the confidentiality, integrity, and availability of the backend may be compromised. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
Severity
8.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:47 UTC
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/0d2… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/56b… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/9e8… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.49.6
Affected: >= 1.50.0-next.0, < 1.50.5 Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 3.3.1
Affected: >= 3.4.0, < 3.4.1 Affected: >= 4.0.0, < 4.0.3 Affected: >= 4.0.4, < 4.1.0 |
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CVE-2026-106499 (GCVE-0-2026-106499)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:25 – Updated: 2026-10-07 17:46
VLAI
EPSS
VEX
Title
Backstage: Secret-derived values may be exposed in scaffolder task logs
Summary
Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package could expose secret-derived values in Scaffolder task logs. Deployments that configure sensitive scaffolder.defaultEnvironment.secrets and allow an attacker to create or modify Scaffolder templates are affected. A template author could cause secret-derived values used during template iteration to be persisted and exposed to users who can access the resulting task logs. This issue is fixed in version 4.1.0.
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 17:45 UTC
CWE
- CWE-532 - Insertion of Sensitive Information into Log File
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/dc3… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 4.1.0
|
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