UBUNTU-CVE-2026-45069
A vulnerability in the Symfony PHP framework prior to versions 6.4.40, 7.4.12, and 8.0.12 allows a validly signed JWT to pass verification even if it omits mandatory claims such as audience (aud), issuer (iss), and expiry (exp). This occurs because the OidcTokenHandler::verifyClaims() method registered claim checkers but did not enforce the mandatory claims list during verification. The issue is fixed in the specified later versions.
AI Analysis
Technical Summary
Symfony's OidcTokenHandler::verifyClaims() method prior to versions 6.4.40, 7.4.12, and 8.0.12 registered checkers for mandatory JWT claims (aud, iss, exp) but failed to pass the mandatory claims list to ClaimCheckerManager::check(). As a result, a validly signed JWT missing these mandatory claims could bypass verification checks. This vulnerability is resolved by ensuring the mandatory claims list is properly enforced in the fixed versions.
Potential Impact
An attacker could present a validly signed JWT that omits mandatory claims and have it accepted as valid by the vulnerable Symfony versions. This could lead to improper authentication or authorization decisions in applications relying on these JWT verifications.
Mitigation Recommendations
Upgrade Symfony to version 6.4.40, 7.4.12, 8.0.12 or later where the issue is fixed. No other mitigations are indicated by the vendor advisory.
UBUNTU-CVE-2026-45069
Description
A vulnerability in the Symfony PHP framework prior to versions 6.4.40, 7.4.12, and 8.0.12 allows a validly signed JWT to pass verification even if it omits mandatory claims such as audience (aud), issuer (iss), and expiry (exp). This occurs because the OidcTokenHandler::verifyClaims() method registered claim checkers but did not enforce the mandatory claims list during verification. The issue is fixed in the specified later versions.
CVSS v4.0
Affected software
pkg:deb/ubuntu/[email protected]?arch=source&distro=xenialpkg:deb/ubuntu/[email protected]+dfsg-1ubuntu0.1+esm2?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/[email protected]+dfsg-1ubuntu1+esm2?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/[email protected]+dfsg-1ubuntu8+esm1?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/[email protected]+dfsg-3ubuntu3+esm1?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/[email protected]+dfsg-1?arch=source&distro=questingpkg:deb/ubuntu/[email protected]+dfsg-1ubuntu1?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Symfony's OidcTokenHandler::verifyClaims() method prior to versions 6.4.40, 7.4.12, and 8.0.12 registered checkers for mandatory JWT claims (aud, iss, exp) but failed to pass the mandatory claims list to ClaimCheckerManager::check(). As a result, a validly signed JWT missing these mandatory claims could bypass verification checks. This vulnerability is resolved by ensuring the mandatory claims list is properly enforced in the fixed versions.
Potential Impact
An attacker could present a validly signed JWT that omits mandatory claims and have it accepted as valid by the vulnerable Symfony versions. This could lead to improper authentication or authorization decisions in applications relying on these JWT verifications.
Mitigation Recommendations
Upgrade Symfony to version 6.4.40, 7.4.12, 8.0.12 or later where the issue is fixed. No other mitigations are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-45069
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 4.0
Threat ID: 6a58b4b168715ace43da95a1
Added to database: 07/16/2026, 10:38:41 UTC
Last enriched: 07/16/2026, 12:48:57 UTC
Last updated: 07/16/2026, 12:48:57 UTC
Views: 2
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