CVE WatchJul 15, 2026

CVE-2026-45133

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 8.0.1

CVSS

7.5

High

EPSS

0.7%

p49

KEV

—

Exploit Today

0-100

Published: Jul 14, 2026 · Last modified: Jul 15, 2026 · CWE-674 · CWE-776 · CWE-1333

EPSS · 30d

0.6%EPSS · 30 days0.7%

2026-07-152026-07-16

Technical 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.

Official references

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