Common Weakness Enumeration
CWE-551
AllowedIncorrect Behavior Order: Authorization Before Parsing and Canonicalization
Abstraction: Base · Status: Incomplete
If a web server does not fully parse requested URLs before it examines them for authorization, it may be possible for an attacker to bypass authorization protection.
30 vulnerabilities reference this CWE, most recent first.
CVE-2026-89060 (GCVE-0-2026-89060)
Vulnerability from cvelistv5 – Published: 2026-09-11 04:22 – Updated: 2026-09-11 20:30
VLAI
EPSS
VEX
Title
Stolostron/multicluster-observability-addon: cross-namespace secret disclosure in multicluster-observability-addon via unvalidated configuration references
Summary
A cross-namespace authorization flaw in multicluster-observability-addon allows a user with permission to modify a managed cluster’s ManagedClusterAddOn configuration to reference ClusterLogForwarder or OpenTelemetryCollector resources outside the permitted namespace. If those resources reference Secrets, the add-on may copy the referenced Secrets to the attacker-controlled managed cluster.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-11 16:31 UTC
CWE
- CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-89060 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2531596 | issue-trackingx_refsource_REDHAT |
| https://github.com/stolostron/multicluster-observ… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , < *
(git)
|
|||
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2 |
cpe:/a:redhat:acm:2
|
Date Public
2026-09-10 00:00
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CVE-2026-57920 (GCVE-0-2026-57920)
Vulnerability from cvelistv5 – Published: 2026-06-26 12:20 – Updated: 2026-06-26 13:32 Exclusively Hosted Service
VLAI
EPSS
VEX
Summary
Peplink InControl 2 through 2.14.2 before 2026-06-03 allows use of a semicolon to bypass access-control rules for certain /rest/o/{orgId} endpoints.
Severity
7.7 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 13:31 UTC
CWE
- CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Assigner
References
1 reference
Impacted products
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CVE-2026-16102 (GCVE-0-2026-16102)
Vulnerability from cvelistv5 – Published: 2026-08-05 13:50 – Updated: 2026-08-31 11:25
VLAI
EPSS
VEX
Title
Keycloak-services: keycloak-services: default dcr policy allows role forgery via user property mappers
Summary
A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management solution. The default DCR policy fails to properly validate the claim path for User Property mappers, allowing them to write values to sensitive internal claim locations. An attacker with a standard user account and a limited Initial Access Token can exploit this to forge administrative roles in their access token. This allows the attacker to take over other clients, steal confidential secrets, and potentially gain full administrative control over the realm.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 14:42 UTC
CWE
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:50846 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:50847 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:50848 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:50849 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-16102 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2501735 | issue-trackingx_refsource_REDHAT |
Impacted products
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.14-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4-22 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.4.14 |
cpe:/a:redhat:build_keycloak:26.4::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6 |
Unaffected:
26.6.5-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.6::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.6 |
Unaffected:
26.6-11 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.6::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.6.5 |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat Data Grid 8 |
cpe:/a:redhat:jboss_data_grid:8
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp
|
|
| Red Hat | Red Hat Single Sign-On 7 |
cpe:/a:redhat:red_hat_single_sign_on:7
|
Date Public
2026-08-05 02:02
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CVE-2026-15573 (GCVE-0-2026-15573)
Vulnerability from cvelistv5 – Published: 2026-08-05 13:50 – Updated: 2026-08-31 09:43
VLAI
EPSS
VEX
Title
Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching in pathmatcher
Summary
A flaw was found in Keycloak's Authorization Services. The component responsible for matching request paths to security policies (PathMatcher) does not properly normalize URIs before comparison. By adding extra characters like a trailing slash or matrix parameters to a URL, an attacker can trick the system into applying a less restrictive security policy than intended. This allows an authenticated user to access administrative or restricted areas they should not have permission to see.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 19:33 UTC
CWE
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:50846 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:50847 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:50848 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:50849 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-15573 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2499593 | issue-trackingx_refsource_REDHAT |
Impacted products
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.14-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4-22 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.4.14 |
cpe:/a:redhat:build_keycloak:26.4::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6 |
Unaffected:
26.6.5-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.6::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.6 |
Unaffected:
26.6-11 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.6::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.6.5 |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat Data Grid 8 |
cpe:/a:redhat:jboss_data_grid:8
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp
|
|
| Red Hat | Red Hat Single Sign-On 7 |
cpe:/a:redhat:red_hat_single_sign_on:7
|
Date Public
2026-08-05 02:02
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CVE-2026-4636 (GCVE-0-2026-4636)
Vulnerability from cvelistv5 – Published: 2026-04-02 12:45 – Updated: 2026-07-15 00:50
VLAI
EPSS
VEX
Title
Keycloak: keycloak: uma policy bypass allows authenticated users to gain unauthorized access to victim-owned resources.
Summary
A flaw was found in Keycloak. An authenticated user with the uma_protection role can bypass User-Managed Access (UMA) policy validation. This allows the attacker to include resource identifiers owned by other users in a policy creation request, even if the URL path specifies an attacker-owned resource. Consequently, the attacker gains unauthorized permissions to victim-owned resources, enabling them to obtain a Requesting Party Token (RPT) and access sensitive information or perform unauthorized actions.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 13:13 UTC
CWE
- CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:6475 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:6476 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:6477 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:6478 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-4636 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2450251 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.15-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2-18 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.2.15 |
cpe:/a:redhat:build_keycloak:26.2::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.11-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4-14 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.4.11 |
cpe:/a:redhat:build_keycloak:26.4::el9
|
Date Public
2026-04-02 12:30
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CVE-2026-0707 (GCVE-0-2026-0707)
Vulnerability from cvelistv5 – Published: 2026-01-08 03:41 – Updated: 2026-06-08 10:21
VLAI
EPSS
VEX
Title
Keycloak: keycloak authorization header parsing leading to potential security control bypass
Summary
A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the "Bearer" authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 specifications.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-08 15:54 UTC
CWE
- CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:3947 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:3948 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-0707 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2427768 | issue-trackingx_refsource_REDHAT |
| https://github.com/keycloak/keycloak/issues/49433 |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.10-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4-12 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.4.10 |
cpe:/a:redhat:build_keycloak:26.4::el9
|
Date Public
2026-01-07 00:00
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CVE-2023-23924 (GCVE-0-2023-23924)
Vulnerability from cvelistv5 – Published: 2023-01-31 23:54 – Updated: 2025-03-10 21:17
VLAI
EPSS
VEX
Title
URI validation failure on SVG parsing in Dompdf
Summary
Dompdf is an HTML to PDF converter. The URI validation on dompdf 2.0.1 can be bypassed on SVG parsing by passing `<image>` tags with uppercase letters. This may lead to arbitrary object unserialize on PHP < 8, through the `phar` URL wrapper. An attacker can exploit the vulnerability to call arbitrary URL with arbitrary protocols, if they can provide a SVG file to dompdf. In PHP versions before 8.0.0, it leads to arbitrary unserialize, that will lead to the very least to an arbitrary file deletion and even remote code execution, depending on classes that are available.
Severity
10 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-10 21:02 UTC
CWE
- CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/dompdf/dompdf/security/advisor… | x_refsource_CONFIRM |
| https://github.com/dompdf/dompdf/commit/7558f07f6… | x_refsource_MISC |
| https://github.com/dompdf/dompdf/releases/tag/v2.0.2 | x_refsource_MISC |
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CVE-2021-34429 (GCVE-0-2021-34429)
Vulnerability from cvelistv5 – Published: 2021-07-15 17:00 – Updated: 2024-08-04 00:12
VLAI
EPSS
VEX
Summary
For Eclipse Jetty versions 9.4.37-9.4.42, 10.0.1-10.0.5 & 11.0.1-11.0.5, URIs can be crafted using some encoded characters to access the content of the WEB-INF directory and/or bypass some security constraints. This is a variation of the vulnerability reported in CVE-2021-28164/GHSA-v7ff-8wcx-gmc5.
Severity
5.3 (Medium)
Assigner
References
38 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Jetty |
Affected:
9.4.37 , < unspecified
(custom)
Affected: unspecified , ≤ 9.4.42 (custom) Affected: 10.0.1 , < unspecified (custom) Affected: unspecified , ≤ 10.0.5 (custom) Affected: 11.0.1 , < unspecified (custom) Affected: unspecified , ≤ 11.0.5 (custom) |
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{
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{
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"name": "[zookeeper-notifications] 20210805 [GitHub] [zookeeper] ztzg opened a new pull request #1734: ZOOKEEPER-4337: Bump jetty to 9.4.43.v20210629 (avoids CVE-2021-34429)",
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"name": "[zookeeper-notifications] 20210805 [GitHub] [zookeeper] ztzg commented on pull request #1734: ZOOKEEPER-4337: Bump jetty to 9.4.43.v20210629 (avoids CVE-2021-34429)",
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"name": "[pulsar-commits] 20210813 [GitHub] [pulsar] eolivelli opened a new issue #11659: Jetty is flagged with CVE-2021-34429",
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"name": "[pulsar-commits] 20210813 [GitHub] [pulsar] lhotari opened a new pull request #11660: [Security] Upgrade Jetty to 9.4.43.v20210629",
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"name": "[pulsar-commits] 20210813 [GitHub] [pulsar] eolivelli closed issue #11659: Jetty is flagged with CVE-2021-34429",
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"name": "[kafka-jira] 20210817 [GitHub] [kafka] jolshan opened a new pull request #11224: KAFKA-13209: Upgrade jetty-server to fix CVE-2021-34429",
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"name": "[kafka-jira] 20210817 [GitHub] [kafka] omkreddy merged pull request #11224: KAFKA-13209: Upgrade jetty-server to fix CVE-2021-34429",
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"name": "[zookeeper-notifications] 20210827 [GitHub] [zookeeper] nkalmar commented on pull request #1734: ZOOKEEPER-4337: Bump jetty to 9.4.43.v20210629 (avoids CVE-2021-34429)",
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"name": "[zookeeper-notifications] 20210805 [GitHub] [zookeeper] ztzg opened a new pull request #1734: ZOOKEEPER-4337: Bump jetty to 9.4.43.v20210629 (avoids CVE-2021-34429)",
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CVE-2021-32779 (GCVE-0-2021-32779)
Vulnerability from cvelistv5 – Published: 2021-08-24 20:45 – Updated: 2024-08-03 23:33
VLAI
EPSS
VEX
Title
Incorrectly handling of URI '#fragment' element as part of the path element
Summary
Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions envoy incorrectly handled a URI '#fragment' element as part of the path element. Envoy is configured with an RBAC filter for authorization or similar mechanism with an explicit case of a final "/admin" path element, or is using a negative assertion with final path element of "/admin". The client sends request to "/app1/admin#foo". In Envoy prior to 1.18.0, or 1.18.0+ configured with path_normalization=false. Envoy treats fragment as a suffix of the query string when present, or as a suffix of the path when query string is absent, so it evaluates the final path element as "/admin#foo" and mismatches with the configured "/admin" path element. In Envoy 1.18.0+ configured with path_normalization=true. Envoy transforms this to /app1/admin%23foo and mismatches with the configured /admin prefix. The resulting URI is sent to the next server-agent with the offending "#foo" fragment which violates RFC3986 or with the nonsensical "%23foo" text appended. A specifically constructed request with URI containing '#fragment' element delivered by an untrusted client in the presence of path based request authorization resulting in escalation of Privileges when path based request authorization extensions. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes that removes fragment from URI path in incoming requests.
Severity
8.6 (High)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.envoyproxy.io/docs/envoy/v1.19.0/vers… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
>= 1.19.0, < 1.19.1
Affected: >= 1.18.0, < 1.18.4 Affected: >= 1.17.0, < 1.17.4 Affected: >= 1.16.0, < 1.16.5 |
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CVE-2021-32777 (GCVE-0-2021-32777)
Vulnerability from cvelistv5 – Published: 2021-08-24 20:25 – Updated: 2024-08-03 23:33
VLAI
EPSS
VEX
Title
Incorrect concatenation of multiple value request headers in ext-authz extension
Summary
Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions when ext-authz extension is sending request headers to the external authorization service it must merge multiple value headers according to the HTTP spec. However, only the last header value is sent. This may allow specifically crafted requests to bypass authorization. Attackers may be able to escalate privileges when using ext-authz extension or back end service that uses multiple value headers for authorization. A specifically constructed request may be delivered by an untrusted downstream peer in the presence of ext-authz extension. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes to the ext-authz extension to correctly merge multiple request header values, when sending request for authorization.
Severity
8.6 (High)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://www.envoyproxy.io/docs/envoy/v1.19.0/vers… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
>= 1.19.0, < 1.19.1
Affected: >= 1.18.0, < 1.18.4 Affected: >= 1.17.0, < 1.17.4 Affected: >= 1.16.0, < 1.16.5 |
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Mitigation
Architecture and Design
URL Inputs should be decoded and canonicalized to the application's current internal representation before being validated and processed for authorization. Make sure that your application does not decode the same input twice. Such errors could be used to bypass allowlist schemes by introducing dangerous inputs after they have been checked.
No CAPEC attack patterns related to this CWE.