CVE-2026-45077Symfony is a PHP framework for web and console applications and a set of reusable PHP components.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.6 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- Weakness (CWE)
- CWE-502, CWE-668
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
sensiolabs symfony sensiolabs:symfony | before 5.4.52; from 6.0.0 before 6.4.40; from 7.0.0 before 7.4.12; from 8.0.0 before 8.0.12 | NVD |
References
- https://github.com/symfony/symfony/commit/0891b2f293896c488e26943dc034334364b77fc4patch
- https://github.com/symfony/symfony/releases/tag/v5.4.52product, release-notes
- https://github.com/symfony/symfony/releases/tag/v6.4.40product, release-notes
- https://github.com/symfony/symfony/releases/tag/v7.4.12product, release-notes
- https://github.com/symfony/symfony/releases/tag/v8.0.12product, release-notes
- https://github.com/symfony/symfony/security/advisories/GHSA-m7v2-7gxm-vc2vpatch, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.