High severity · published Jul 14, 2026
CVE-2026-48489
Symfony: Security Firewall Bypass via failure_forward Subrequest: Unauthenticated Access to access_control-Protected GET Routes
7.5
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
security-http · 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 · source: vendor
SY
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 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-48489
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-48489
Patch
https://github.com/symfony/symfony/commit/c48a4276309e11aedeeb0ce3a89dfbf0b4fe04ff
Product
https://github.com/symfony/symfony/releases/tag/v5.4.53
Product
https://github.com/symfony/symfony/releases/tag/v6.4.41
Product
https://github.com/symfony/symfony/releases/tag/v7.4.13
Patch
https://github.com/symfony/symfony/security/advisories/GHSA-6h46-9jf5-q59x
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