Authentication Bypass Vulnerability in Symfony Framework
CVE-2026-48489

8.7HIGH

Key Information:

Vendor

Symfony

Status
Symfony
Security-http
Vendor
CVE Published:
14 July 2026

What is CVE-2026-48489?

A vulnerability in the Symfony PHP framework allows an unauthenticated user to bypass access controls by leveraging the _failure_path parameter during failed login attempts. When the failure_forward is enabled, this flaw enables attackers to dispatch subrequests to GET routes protected by access control, effectively bypassing firewall protections. This issue has been resolved in the latest versions of Symfony, including 5.4.53, 6.4.41, 7.4.13, and 8.0.13.

Affected Version(s)

security-http < 5.4.53 < 5.4.53

security-http >= 6.0.0-BETA1, < 6.4.41 < 6.0.0-BETA1, 6.4.41

security-http >= 7.0.0-BETA1, < 7.4.13 < 7.0.0-BETA1, 7.4.13

References

https://github.com/symfony/symfony/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/symfony/symfony/commit/c48a4276309e11a...
x_refsource_MISC
https://github.com/symfony/symfony/releases/tag/v5.4.53
x_refsource_MISC

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.