Vulnerability in Sensiolabs Symfony
CVE-2026-45069
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 6.4.40, 7.4.12, and 8.0.12, OidcTokenHandler::verifyClaims() registered audience (aud), issuer (iss), and expiry (exp) checkers but did not pass the mandatory claims list to ClaimCheckerManager::check(), so a validly signed JWT that omitted those claims could pass verification. This issue is fixed in versions 6.4.40, 7.4.12, and 8.0.12.
EPSS: 0.003 (17.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Sensiolabs Symfony
- Symfony Security-http — versions >= 6.3.0, < 6.4.40, >= 7.4.0, < 7.4.12, >= 8.0.0-BETA1, < 8.0.12
- Symfony — versions >= 6.3.0, < 6.4.40, >= 7.4.0, < 7.4.12, >= 8.0.0-BETA1, < 8.0.12
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-45069?
- CVE-2026-45069 is a critical-severity vulnerability in Sensiolabs Symfony, classified under Insufficient Verification of Data Authenticity. CVSS score: 9.1/10. Published 2026-07-14.
- How severe is CVE-2026-45069?
- Critical severity. CVSS v3 base score is 9.1 out of 10.