CVE-2026-45074
HIGHSymfony: Cas2Handler Derives CAS service URL from Client Host Header → Cross-Service Ticket Replay
Title source: cnaDescription
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.
References (4)
Core 4
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/symfony/symfony/security/advisories/GHSA-j8gj-9rm5-4xhx
X_Refsource_Misc x_refsource_misc
https://github.com/symfony/symfony/commit/5ba145dba702404801bdf9e7e8d6df170060d541
X_Refsource_Misc x_refsource_misc
https://github.com/symfony/symfony/releases/tag/v7.4.12
X_Refsource_Misc x_refsource_misc
https://github.com/symfony/symfony/releases/tag/v8.0.12
Scores
CVSS v3
8.1
EPSS
0.0041
EPSS Percentile
33.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-290
Status
published
Products (5)
sensiolabs/symfony
7.1.0 - 7.4.12
symfony/security-http
>= 7.1.0-BETA1, < 7.4.12
symfony/security-http
>= 8.0.0-BETA1, < 8.0.12
symfony/symfony
>= 7.1.0-BETA1, < 7.4.12
symfony/symfony
>= 8.0.0-BETA1, < 8.0.12
Published
Jul 14, 2026
Tracked Since
Jul 14, 2026