CVE-2026-45074
Symfony: Cas2Handler Derives CAS service URL from Client Host Header → Cross-Service Ticket Replay
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-290 |
| Vendor | symfony |
| Product | symfony |
| Published | Jul 14, 2026 |
| Last Updated | Jul 14, 2026 |
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Affected Versions
symfony / symfony
>= 7.1.0-BETA1, < 7.4.12 >= 8.0.0-BETA1, < 8.0.12
symfony / security-http
>= 7.1.0-BETA1, < 7.4.12 >= 8.0.0-BETA1, < 8.0.12
References
github.com: https://github.com/symfony/symfony/security/advisories/GHSA-j8gj-9rm5-4xhx github.com: https://github.com/symfony/symfony/commit/5ba145dba702404801bdf9e7e8d6df170060d541 github.com: https://github.com/symfony/symfony/releases/tag/v7.4.12 github.com: https://github.com/symfony/symfony/releases/tag/v8.0.12