CVE-2026-45077
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.
Scoring
- Severity
- HIGH
- CVSS base score
- 8.3
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
- EPSS probability
- 0.67%
- CWE
- CWE-502, CWE-668
- Published
- 2026-07-14
- Last modified
- 2026-07-14
Affected products
- symfony symfony
- symfony symfony
- symfony symfony
- symfony symfony
- symfony monolog-bridge
- symfony monolog-bridge
- symfony monolog-bridge
- symfony monolog-bridge
Weakness type
Related vulnerabilities
- CVE-2026-81784 — WordPress Wise Chat plugin <= 3.4 - PHP Object Injection vulnerability
- CVE-2026-87930 — MaxSite CMS through 109.6 PHP Object Injection via ci_session
- CVE-2026-87874 — Community.general: community.general: memcached cache plugin deserializes untrusted pickle data from memcached, enabling cache-poisoning remote code execution on the ansible controller
- CVE-2024-58381 — PocketMine-MP before 5.11.1 Denial of Service via LoginPacket
- CVE-2026-11363 — Ninja Forms <= 3.14.6 - Authenticated (Administrator+) PHP Object Injection via Form Import
- CVE-2026-87083 — tile-ai tilelang Kernel Cache kernel_cache.py KernelCache._load_kernel_from_disk deserialization
- CVE-2026-81385 — Microsoft Office Publisher Remote Code Execution Vulnerability
- CVE-2026-77484 — Microsoft SQL Server Remote Code Execution Vulnerability