Packagist/symfony/symfony CVE-2026-45077: high, EPSS 0.67%

Symfony has Unauthenticated PHP Object Deserialization in MonologBridge server:log Listener

Action: Upgrade symfony/symfony to 5.4.52 or later.

composer require symfony/symfony:5.4.52

composer require symfony/symfony:6.4.40

composer require symfony/symfony:7.4.12

composer require symfony/symfony:8.0.12

Affected

Fixed versions

Sources

• osv: GHSA-m7v2-7gxm-vc2v#Packagist/symfony/symfony
• https://github.com/symfony/symfony/security/advisories/GHSA-m7v2-7gxm-vc2v
• https://github.com/symfony/symfony/commit/0891b2f293896c488e26943dc034334364b77fc4
• https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/monolog-bridge/CVE-2026-45077.yaml
• https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-45077.yaml
• https://github.com/symfony/symfony
• https://symfony.com/cve-2026-45077

CVE-2026-45077 · published 2026-05-27T21:13:29Z · modified 2026-09-10T03:51:06.427699207Z · JSON