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Vulnerability from cleanstart
Published
2026-08-13 12:10
Modified
2026-08-14 05:56
Summary
Security fixes in temporal-server 1.31.1-r3
Details
Package temporal-server version 1.31.1-r3 fixes 8 vulnerabilities: ghsa-q98v-9f9w-f49q, ghsa-hmhp-gh8m-c8xp, ghsa-p2gr-hm8g-q772, ghsa-xpg8-3hhp-p7w8, CVE-2025-14987...
References
| URL | Type | |
|---|---|---|
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"upstream": [
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}
CVE-2025-14986 (GCVE-0-2025-14986)
Vulnerability from cvelistv5 – Published: 2025-12-30 20:17 – Updated: 2026-01-02 15:31
VLAI
EPSS
VEX
Title
ExecuteMultiOperation Namespace Policy Bypass
Summary
When frontend.enableExecuteMultiOperation is enabled, the server can apply namespace-scoped validation and feature gates for the embedded StartWorkflowExecutionRequest using its Namespace field rather than the outer, authorized ExecuteMultiOperationRequest.Namespace. This allows a caller authorized for one namespace to bypass that namespace's limits/policies by setting the embedded start request's namespace to a different namespace. The workflow is still created in the outer (authorized) namespace; only validation/gating is performed under the wrong namespace context.
This issue affects Temporal: from 1.24.0 through 1.29.1. Fixed in 1.27.4, 1.28.2, 1.29.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-02 15:30 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
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CVE-2025-14987 (GCVE-0-2025-14987)
Vulnerability from cvelistv5 – Published: 2025-12-30 20:16 – Updated: 2026-01-02 15:30
VLAI
EPSS
VEX
Title
Cross Namespace Commands Authorization Bypass
Summary
When system.enableCrossNamespaceCommands is enabled (on by default), the Temporal server permits certain workflow task commands (e.g. StartChildWorkflowExecution, SignalExternalWorkflowExecution, RequestCancelExternalWorkflowExecution) to target a different namespace than the namespace authorized at the gRPC boundary. The frontend authorizes RespondWorkflowTaskCompleted based on the outer request namespace, but the history service later resolves and executes the command using the namespace embedded in command attributes without authorizing the caller for that target namespace. This can allow a worker authorized for one namespace to create, signal, or cancel workflows in another namespace.
This issue affects Temporal: through 1.29.1. Fixed in 1.27.4, 1.28.2, 1.29.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-02 15:30 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
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CVE-2026-5199 (GCVE-0-2026-5199)
Vulnerability from cvelistv5 – Published: 2026-04-01 17:49 – Updated: 2026-04-01 18:24
VLAI
EPSS
VEX
Title
Cross Namespace Access via Batch Operation
Summary
A writer role user in an attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster. Exploitation requires the attacker to know or guess specific victim workflow ID(s) and, for signal operations, signal names. This was due to a bug introduced in Temporal Server v1.29.0 which inadvertently allowed an attacker to control the namespace name value instead of using the server's own trusted name value within the batch activity code. The batch activity validated the namespace ID but did not cross-check the namespace name against the worker's bound namespace, allowing the per-namespace worker's privileged credentials to operate on an arbitrary namespace. Exploitation requires a server configuration where internal components have cross-namespace authorization, such as deployment of the internal-frontend service or equivalent TLS-based authorization for internal identities.
This vulnerability also impacted Temporal Cloud when the attacker and victim namespaces were on the same cell, with the same preconditions as self-hosted clusters.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-01 18:23 UTC
CWE
- CWE-639 - Authorization bypass through User-Controlled key
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Temporal Technologies, Inc. | temporal |
Affected:
1.29.0 , < 1.29.5
(semver)
Affected: 1.30.0 , < 1.30.3 (semver) |
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CVE-2026-5724 (GCVE-0-2026-5724)
Vulnerability from cvelistv5 – Published: 2026-04-10 21:06 – Updated: 2026-07-08 19:20
VLAI
EPSS
VEX
Title
Missing Authentication on Streaming gRPC Replication Endpoint
Summary
The frontend gRPC server's streaming interceptor chain did not include the authorization interceptor. When a ClaimMapper and Authorizer are configured, unary RPCs enforce authentication and authorization, but the streaming AdminService/StreamWorkflowReplicationMessages endpoint accepted requests without credentials. This endpoint is registered on the same port as WorkflowService and cannot be disabled independently. An attacker with network access to the frontend port could open the replication stream without authentication. Data exfiltration is possible, but only when a configured replication target is correctly configured and the attacker has knowledge of the cluster configuration, as the history service validates cluster IDs and peer membership before returning replication data.
The fix was applied per release line: it is present in 1.28.4, 1.29.6, 1.30.4, 1.31.2, and 1.32.0 and later releases on each line. Releases 1.31.0 and 1.31.1 do not contain the fix and are affected.
Temporal Cloud is not affected.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-13 16:10 UTC
CWE
- CWE-306 - Missing authentication for critical function
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Temporal Technologies, Inc. | temporal |
Affected:
1.24.0 , < 1.28.4
(semver)
Affected: 1.29.0 , < 1.29.6 (semver) Affected: 1.30.0 , < 1.30.4 (semver) Affected: 1.31.0 , < 1.31.2 (semver) |
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GHSA-HMHP-GH8M-C8XP
Vulnerability from github – Published: 2025-12-30 21:30 – Updated: 2026-01-02 15:46
VLAI
Summary
Temporal has an Incorrect Authorization vulnerability
Details
When system.enableCrossNamespaceCommands is enabled (on by default), the Temporal server permits certain workflow task commands (e.g. StartChildWorkflowExecution, SignalExternalWorkflowExecution, RequestCancelExternalWorkflowExecution) to target a different namespace than the namespace authorized at the gRPC boundary. The frontend authorizes RespondWorkflowTaskCompleted based on the outer request namespace, but the history service later resolves and executes the command using the namespace embedded in command attributes without authorizing the caller for that target namespace. This can allow a worker authorized for one namespace to create, signal, or cancel workflows in another namespace. This issue affects Temporal: through 1.29.1. Fixed in 1.27.4, 1.28.2, 1.29.2.
Severity
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "go.temporal.io/server"
},
"ranges": [
{
"events": [
{
"introduced": "0"
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{
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],
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},
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],
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"cwe_ids": [
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],
"github_reviewed": true,
"github_reviewed_at": "2026-01-02T15:46:14Z",
"nvd_published_at": "2025-12-30T21:15:43Z",
"severity": "MODERATE"
},
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"published": "2025-12-30T21:30:33Z",
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"url": "https://github.com/temporalio/temporal/commit/b292a32bacdfa6472affd90f0a940408d5839cfa"
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{
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"url": "https://github.com/temporalio/temporal/releases/tag/v1.28.2"
},
{
"type": "WEB",
"url": "https://github.com/temporalio/temporal/releases/tag/v1.29.2"
}
],
"schema_version": "1.4.0",
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"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L",
"type": "CVSS_V4"
}
],
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GHSA-P2GR-HM8G-Q772
Vulnerability from github – Published: 2025-12-30 21:30 – Updated: 2025-12-31 22:08
VLAI
Summary
Temporal has a namespace policy bypass allowing requests to be authorized for incorrect contexts
Details
When frontend.enableExecuteMultiOperation is enabled, the server can apply namespace-scoped validation and feature gates for the embedded StartWorkflowExecutionRequest using its Namespace field rather than the outer, authorized ExecuteMultiOperationRequest.Namespace. This allows a caller authorized for one namespace to bypass that namespace's limits/policies by setting the embedded start request's namespace to a different namespace. The workflow is still created in the outer (authorized) namespace; only validation/gating is performed under the wrong namespace context. This issue affects Temporal: from 1.24.0 through 1.29.1. Fixed in 1.27.4, 1.28.2, 1.29.2.
Severity
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"package": {
"ecosystem": "Go",
"name": "go.temporal.io/server"
},
"ranges": [
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"events": [
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"introduced": "1.24.0"
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},
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}
],
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]
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],
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],
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],
"github_reviewed": true,
"github_reviewed_at": "2025-12-31T22:08:24Z",
"nvd_published_at": "2025-12-30T21:15:42Z",
"severity": "LOW"
},
"details": "When frontend.enableExecuteMultiOperation is enabled, the server can apply namespace-scoped validation and feature gates for the embedded StartWorkflowExecutionRequest using its Namespace field rather than the outer, authorized ExecuteMultiOperationRequest.Namespace. This allows a caller authorized for one namespace to bypass that namespace\u0027s limits/policies by setting the embedded start request\u0027s namespace to a different namespace. The workflow is still created in the outer (authorized) namespace; only validation/gating is performed under the wrong namespace context.\nThis issue affects Temporal: from 1.24.0 through 1.29.1. Fixed in 1.27.4, 1.28.2, 1.29.2.",
"id": "GHSA-p2gr-hm8g-q772",
"modified": "2025-12-31T22:08:24Z",
"published": "2025-12-30T21:30:33Z",
"references": [
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},
{
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},
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}
],
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}
GHSA-Q98V-9F9W-F49Q
Vulnerability from github – Published: 2026-04-10 21:31 – Updated: 2026-04-13 19:23
VLAI
Summary
Temporal does not enforce authentication and authorization for the streaming AdminService/StreamWorkflowReplicationMessages endpoint
Details
The frontend gRPC server's streaming interceptor chain did not include the authorization interceptor. When a ClaimMapper and Authorizer are configured, unary RPCs enforce authentication and authorization, but the streaming AdminService/StreamWorkflowReplicationMessages endpoint accepted requests without credentials. This endpoint is registered on the same port as WorkflowService and cannot be disabled independently. An attacker with network access to the frontend port could open the replication stream without authentication. Data exfiltration is possible, but only when a configured replication target is correctly configured and the attacker has knowledge of the cluster configuration, as the history service validates cluster IDs and peer membership before returning replication data.
Temporal Cloud is not affected.
Severity
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"name": "go.temporal.io/server"
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"ranges": [
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"introduced": "0"
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},
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"ranges": [
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],
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}
]
},
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"name": "go.temporal.io/server"
},
"ranges": [
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},
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"fixed": "1.30.4"
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"type": "ECOSYSTEM"
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"github_reviewed_at": "2026-04-13T19:23:25Z",
"nvd_published_at": "2026-04-10T21:16:28Z",
"severity": "MODERATE"
},
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"id": "GHSA-q98v-9f9w-f49q",
"modified": "2026-04-13T19:23:25Z",
"published": "2026-04-10T21:31:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5724"
},
{
"type": "PACKAGE",
"url": "https://github.com/temporalio/temporal"
},
{
"type": "WEB",
"url": "https://github.com/temporalio/temporal/releases/tag/v1.28.4"
},
{
"type": "WEB",
"url": "https://github.com/temporalio/temporal/releases/tag/v1.29.6"
},
{
"type": "WEB",
"url": "https://github.com/temporalio/temporal/releases/tag/v1.30.4"
}
],
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}
],
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}
GHSA-XPG8-3HHP-P7W8
Vulnerability from github – Published: 2026-04-01 18:36 – Updated: 2026-07-21 14:59
VLAI
Summary
Temporal Server: attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster
Details
A writer role user in an attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster. Exploitation requires the attacker to know or guess specific victim workflow ID(s) and, for signal operations, signal names. This was due to a bug introduced in Temporal Server v1.29.0 which inadvertently allowed an attacker to control the namespace name value instead of using the server's own trusted name value within the batch activity code. The batch activity validated the namespace ID but did not cross-check the namespace name against the worker's bound namespace, allowing the per-namespace worker's privileged credentials to operate on an arbitrary namespace. Exploitation requires a server configuration where internal components have cross-namespace authorization, such as deployment of the internal-frontend service or equivalent TLS-based authorization for internal identities.
This vulnerability also impacted Temporal Cloud when the attacker and victim namespaces were on the same cell, with the same preconditions as self-hosted clusters.
Severity
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"package": {
"ecosystem": "Go",
"name": "go.temporal.io/server"
},
"ranges": [
{
"events": [
{
"introduced": "1.30.0-143.0"
},
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"fixed": "1.30.3"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "go.temporal.io/server"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.29.5"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-5199"
],
"database_specific": {
"cwe_ids": [
"CWE-639"
],
"github_reviewed": true,
"github_reviewed_at": "2026-04-03T23:25:37Z",
"nvd_published_at": "2026-04-01T18:16:31Z",
"severity": "LOW"
},
"details": "A writer role user in an attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster. Exploitation requires the attacker to know or guess specific victim workflow ID(s) and, for signal operations, signal names. This was due to a bug introduced in Temporal Server v1.29.0 which inadvertently allowed an attacker to control the namespace name value instead of using the server\u0027s own trusted name value within the batch activity code. The batch activity validated the namespace ID but did not cross-check the namespace name against the worker\u0027s bound namespace, allowing the per-namespace worker\u0027s privileged credentials to operate on an arbitrary namespace. Exploitation requires a server configuration where internal components have cross-namespace authorization, such as deployment of the internal-frontend service or equivalent TLS-based authorization for internal identities.\n\nThis vulnerability also impacted Temporal Cloud when the attacker and victim namespaces were on the same cell, with the same preconditions as self-hosted clusters.",
"id": "GHSA-xpg8-3hhp-p7w8",
"modified": "2026-07-21T14:59:09Z",
"published": "2026-04-01T18:36:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5199"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-xpg8-3hhp-p7w8"
},
{
"type": "PACKAGE",
"url": "https://github.com/temporalio/temporal"
},
{
"type": "WEB",
"url": "https://github.com/temporalio/temporal/releases/tag/v1.29.5"
},
{
"type": "WEB",
"url": "https://github.com/temporalio/temporal/releases/tag/v1.30.3"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L",
"type": "CVSS_V4"
}
],
"summary": "Temporal Server: attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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