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($message)) without authentication, integrity checks, or an allowed_classes allowlist, allowing any reachable host to submit attacker-chosen serialized PHP payloads that can crash the listener and may trigger object-injection gadget effects. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
Project Subscriptions
No data.
Advisories
| Source | ID | Title |
|---|---|---|
Debian DSA |
DSA-6312-1 | symfony security update |
Debian DSA |
DSA-6317-1 | symfony security update |
Github GHSA |
GHSA-m7v2-7gxm-vc2v | Symfony has Unauthenticated PHP Object Deserialization in MonologBridge server:log Listener |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Tue, 14 Jul 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Tue, 14 Jul 2026 18:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, the server:log listener (Symfony\Bridge\Monolog\Command\ServerLogCommand) binds to 0.0.0.0:9911 by default and processes each received frame with unserialize(base64_decode($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. | |
| Title | Symfony: Unauthenticated PHP Object Deserialization in MonologBridge server:log Listener | |
| Weaknesses | CWE-502 CWE-668 |
|
| References |
|
|
| Metrics |
cvssV4_0
|
Projects
Sign in to view the affected projects.
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-14T18:24:19.069Z
Reserved: 2026-05-08T18:45:10.097Z
Link: CVE-2026-45077
Updated: 2026-07-14T18:24:16.139Z
No data.
No data.
OpenCVE Enrichment
No data.
Debian DSA
Github GHSA