CVE-2026-45063

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, X509Authenticator extracts the user identifier from $_SERVER['SSL_CLIENT_S_DN'] with an unanchored regex that matches emailAddress= anywhere in the distinguished name, allowing an attacker with a trusted certificate containing emailAddress=victim inside another RDN value such as CN to authenticate as the victim. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/symfony/symfony/commit/59ef484029601a7af06f5e06c6ed921fdcea5a0d	Patch
https://github.com/symfony/symfony/releases/tag/v5.4.52	Product Release Notes
https://github.com/symfony/symfony/releases/tag/v6.4.40	Product Release Notes
https://github.com/symfony/symfony/releases/tag/v7.4.12	Product Release Notes
https://github.com/symfony/symfony/releases/tag/v8.0.12	Product Release Notes
https://github.com/symfony/symfony/security/advisories/GHSA-ph86-p8f6-f9r2	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:sensiolabs:symfony::::::::
	cpe:2.3:a:sensiolabs:symfony::::::::
	cpe:2.3:a:sensiolabs:symfony::::::::
	cpe:2.3:a:sensiolabs:symfony::::::::

History

No history.

Information

Published : 2026-07-14 19:17

Updated : 2026-07-15 15:01

NVD link : CVE-2026-45063

Mitre link : CVE-2026-45063

CVE.ORG link : CVE-2026-45063

JSON object : View

Products Affected

sensiolabs

symfony

CWE

CWE-290

Authentication Bypass by Spoofing

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