Vulnerability Description
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 7.1.0 until 7.4.12 and 8.0.12, Cas2Handler builds the CAS service parameter from Request::getSchemeAndHttpHost(), which reflects an attacker-controlled Host header when framework.trusted_hosts is not configured; an attacker controlling another application registered with the same CAS server can replay a victim ticket against the Symfony application and authenticate as the victim. This issue is fixed in versions 7.4.12 and 8.0.12.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sensiolabs | Symfony | >= 7.1.0, < 7.4.12 |
Related Weaknesses (CWE)
References
- https://github.com/symfony/symfony/commit/5ba145dba702404801bdf9e7e8d6df170060d5Patch
- https://github.com/symfony/symfony/releases/tag/v7.4.12ProductRelease Notes
- https://github.com/symfony/symfony/releases/tag/v8.0.12ProductRelease Notes
- https://github.com/symfony/symfony/security/advisories/GHSA-j8gj-9rm5-4xhxPatchVendor Advisory
FAQ
What is CVE-2026-45074?
CVE-2026-45074 is a vulnerability with a CVSS score of 8.1 (HIGH). Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 7.1.0 until 7.4.12 and 8.0.12, Cas2Handler builds the CAS service parameter from Request::getSche...
How severe is CVE-2026-45074?
CVE-2026-45074 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45074?
Check the references section above for vendor advisories and patch information. Affected products include: Sensiolabs Symfony.