CVE-2026-45077

Summary

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 Software

VendorProductVersion RangeStatus
symfonysymfony< 5.4.52affected
symfonysymfony>= 6.0.0-BETA1, < 6.4.40affected
symfonysymfony>= 7.0.0-BETA1, < 7.4.12affected
symfonysymfony>= 8.0.0-BETA1, < 8.0.12affected
symfonymonolog-bridge< 5.4.52affected
symfonymonolog-bridge>= 6.0.0-BETA1, < 6.4.40affected
symfonymonolog-bridge>= 7.0.0-BETA1, < 7.4.12affected
symfonymonolog-bridge>= 8.0.0-BETA1, < 8.0.12affected

Weaknesses

  • CWE-502: CWE-502: Deserialization of Untrusted Data
  • CWE-668: CWE-668: Exposure of Resource to Wrong Sphere

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References