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CVE-2026-45077

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

Description (CNA)

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, the server:log listener (Symfony\Bridge\Monolog\Command\ServerLogCommand) binds to 0.0.0.0:9911 by default and processes each received frame with unserialize(base64_decode($message)) without authentication, integrity checks, or an allowed_classes allowlist, allowing any reachable host to submit attacker-chosen serialized PHP payloads that can crash the listener and may trigger object-injection gadget effects. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.

Affected (CNA)

Vendor / productVersions
symfony / symfonyaffected < 5.4.52; affected >= 6.0.0-BETA1, < 6.4.40; affected >= 7.0.0-BETA1, < 7.4.12; affected >= 8.0.0-BETA1, < 8.0.12
symfony / monolog-bridgeaffected < 5.4.52; affected >= 6.0.0-BETA1, < 6.4.40; affected >= 7.0.0-BETA1, < 7.4.12; affected >= 8.0.0-BETA1, < 8.0.12

CWE

CWE-502, CWE-668

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.