VULNERABILITY INTELLIGENCE
CVE-2026-45133
CVSS score7.5 HIGH
EPSS probability0.63%
CISA KEVNot currently listed
Published2026-07-14
Last modified2026-07-15
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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, when the parser is exposed to attacker-controlled input, deeply nested mappings or sequences cause both the block-level (Parser::parseBlock()) and inline (Inline::parseSequence() / Inline::parseMapping()) parsers to recurse without a depth limit. A crafted document exhausts the PHP stack and crashes the worker. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
Weakness classification
- security-advisories@github.com: CWE-674
Primary references
- security-advisories@github.com — Product, Release Notes
- security-advisories@github.com — Product, Release Notes
- security-advisories@github.com — Product, Release Notes
- security-advisories@github.com — Product, Release Notes
- security-advisories@github.com — Patch, Vendor Advisory