Riskcovery

CVE-2026-45074

Symfony: Cas2Handler Derives CAS service URL from Client Host Header → Cross-Service Ticket Replay

State
Published
Severity
7.6 High
Published
Jul 14, 2026
Updated
Jul 14, 2026
Reserved
May 8, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.07.6 HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:NGitHub_M

Weaknesses

  • CWE-290 Authentication Bypass by Spoofing

Affected Products

ProductVersions
symfonysymfony
  • >= 7.1.0-BETA1, < 7.4.12Affected
  • >= 8.0.0-BETA1, < 8.0.12Affected
security-httpsymfony
  • >= 7.1.0-BETA1, < 7.4.12Affected
  • >= 8.0.0-BETA1, < 8.0.12Affected

References

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