CVE-2026-45074 Details
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.
A vulnerability in Symfony's CAS2Handler component allows for cross-service ticket replay attacks. This issue affects Symfony versions 7.1.0 through 7.4.12 and 8.0.12. The vulnerability arises because Cas2Handler constructs the CAS service parameter using the Request::getSchemeAndHttpHost() method, which can be manipulated by an attacker through the Host header, if the framework.trusted_hosts setting is not properly configured. An attacker controlling another application registered with the same CAS server can exploit this to replay a victim's ticket and authenticate as that victim.
Users should update to Symfony versions 7.4.12 or 8.0.12, where this vulnerability has been fixed. Instructions for updating can be found in the Symfony release notes.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/symfony/symfony/commit/5ba145dba702404801bdf9e7e8d6df170060d541 | [email protected] | Patch |
| https://github.com/symfony/symfony/releases/tag/v7.4.12 | [email protected] | ProductRelease Notes |
| https://github.com/symfony/symfony/releases/tag/v8.0.12 | [email protected] | ProductRelease Notes |
| https://github.com/symfony/symfony/security/advisories/GHSA-j8gj-9rm5-4xhx | [email protected] | PatchVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-290 | Authentication Bypass by Spoofing | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| sensiolabs symfony | >= 7.1.0, < 7.4.12 >= 8.0.0, < 8.0.12 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 15, 2026 | Initial Analysis | [email protected] |
| Jul 14, 2026 | CVE Modified | CISA-ADP |
| Jul 14, 2026 | New CVE Received | [email protected] |