PT-2026-44138 · Symfony · Symfony

Published 2026-05-21 · Updated 2026-05-27 · CVE-2026-45069

Positive Technologies (AI Summary)

CVSS v4.0

4.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U

Name of the Vulnerable Software and Affected Versions Symfony versions prior to 6.4

Description The OidcTokenHandler component, used for OpenID Connect access-token handling, fails to properly validate mandatory claims in bearer JWTs. While it registers checkers for audience (aud), issuer (iss), and expiry (exp), it does not pass the $mandatoryClaims argument to the ClaimCheckerManager::check() function. Consequently, the system only validates claims that are present in the token and silently skips those that are missing. This allows a validly-signed JWT that omits the aud, iss, and exp claims to pass verification.

Recommendations Update to version 6.4 or later.

Exploit

Fix

Insufficient Verification of Data Authenticity

Weakness Enumeration

CWE-1287

CWE-345

Related Identifiers

CVE-2026-45069

GHSA-29FC-P6C4-24CG

Affected Products

Symfony

References · 13

• 🔥 https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-45069.yaml · Exploit
• 🔥 https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2026-45069.yaml · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-45069 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-45069 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-45069 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-29fc-p6c4-24cg · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-45069 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-45069 · Security Note
• https://github.com/symfony/symfony · Note
• https://github.com/symfony/symfony/commit/6b717aaac21b7e96798448d14c4355ea87690b3d · Note
• https://github.com/symfony/symfony/security/advisories/GHSA-29fc-p6c4-24cg · Note
• https://symfony.com/cve-2026-45069 · Note
• https://symfony.com/blog/cve-2026-45069-oidctokenhandler-accepts-jwts-missing-aud-iss-exp-claims · Note