Vulnerability · Published Jul 14, 2026 · Assigned by GitHub_M
CVE-2026-48489Symfony: Security Firewall Bypass via failure_forward Subrequest: Unauthenticated Access to access_control-Protected GET Routes
High 8.7
In plain English
A high-severity incorrect authorization in security-http from symfony. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.53, 6.4.41, 7.4.13, and 8.0.13, DefaultAuthenticationFailureHandler honored the request-supplied _failure_path parameter when failure_forward: true was enabled, allowing an unauthenticated failing login request to dispatch a subrequest to access_control-protected GET routes that skipped firewall listeners. This issue is fixed in versions 5.4.53, 6.4.41, 7.4.13, and 8.0.13.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | symfony | 5.4.53+dfsg-0+deb12u1 | DEBIAN-CVE-2026-48489 |
| Debian:13 | symfony | 6.4.41+dfsg-0+deb13u1 | DEBIAN-CVE-2026-48489 |
| Debian:14 | symfony | 7.4.13+dfsg-1 | DEBIAN-CVE-2026-48489 |
| Packagist | symfony/security-http | 5.4.53 | GHSA-6h46-9jf5-q59x |
| Packagist | symfony/security-http | 8.0.13 | GHSA-6h46-9jf5-q59x |
| Packagist | symfony/security-http | 6.4.41 | GHSA-6h46-9jf5-q59x |
| Packagist | symfony/security-http | 7.4.13 | GHSA-6h46-9jf5-q59x |
| Packagist | symfony/symfony | 8.0.13 | GHSA-6h46-9jf5-q59x |
| Packagist | symfony/symfony | 5.4.53 | GHSA-6h46-9jf5-q59x |
| Packagist | symfony/symfony | 6.4.41 | GHSA-6h46-9jf5-q59x |
| Packagist | symfony/symfony | 7.4.13 | GHSA-6h46-9jf5-q59x |
| Ubuntu:25.10 | symfony | no fix listed | UBUNTU-CVE-2026-48489 |
| Ubuntu:26.04:LTS | symfony | no fix listed | UBUNTU-CVE-2026-48489 |
| Ubuntu:26.10 | symfony | no fix listed | UBUNTU-CVE-2026-48489 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| symfony | symfony | < 5.4.53>= 6.0.0-BETA1, < 6.4.41>= 7.0.0-BETA1, < 7.4.13>= 8.0.0-BETA1, < 8.0.13 |
| symfony | security-http | < 5.4.53>= 6.0.0-BETA1, < 6.4.41>= 7.0.0-BETA1, < 7.4.13>= 8.0.0-BETA1, < 8.0.13 |
Weakness: CWE-863 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/symfony/symfony/security/advisories/GHSA-6h46-9jf5-q59x x_refsource_CONFIRM
- https://github.com/symfony/symfony/commit/c48a4276309e11aedeeb0ce3a89dfbf0b4fe04ff x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v5.4.53 x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v6.4.41 x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v7.4.13 x_refsource_MISC