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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-j8gj-9rm5-4xhx Symfony's Cas2Handler Derives CAS service URL from Client Host Header → Cross-Service Ticket Replay
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 27 Jul 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Symfony
Symfony security-http
Symfony symfony
Vendors & Products Symfony
Symfony security-http
Symfony symfony

Tue, 14 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 14 Jul 2026 18:15:00 +0000

Type Values Removed Values Added
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.
Title Symfony: Cas2Handler Derives CAS service URL from Client Host Header → Cross-Service Ticket Replay
Weaknesses CWE-290
References
Metrics cvssV4_0

{'score': 7.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-07-14T18:24:34.062Z

Reserved: 2026-05-08T18:45:10.096Z

Link: CVE-2026-45074

cve-icon Vulnrichment

Updated: 2026-07-14T18:24:28.019Z

cve-icon NVD

Status : Analyzed

Published: 2026-07-14T18:17:16.990

Modified: 2026-07-15T15:35:14.170

Link: CVE-2026-45074

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-31T06:00:16Z

Weaknesses