CVE-2026-45063

CRITICAL

Symfony: Identity Spoofing via Unanchored DN Regex in X509Authenticator

Title source: cna
STIX 2.1

Description

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.

References (6)

Core 6

Scores

CVSS v3 9.1
EPSS 0.0033
EPSS Percentile 25.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-290
Status published
Products (5)
sensiolabs/symfony < 5.4.52
symfony/symfony < 5.4.52
symfony/symfony >= 6.0.0-BETA1, < 6.4.40
symfony/symfony >= 7.0.0-BETA1, < 7.4.12
symfony/symfony >= 8.0.0-BETA1, < 8.0.12
Published Jul 14, 2026
Tracked Since Jul 15, 2026