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CVE-2026-45305

Symfony: YAML Parser ReDoS via Catastrophic Backtracking in Parser::cleanup() Regex PUBLISHED

Description (CNA)

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, Symfony\Component\Yaml\Parser::cleanup() used regular expressions with overlapping quantifiers for YAML directive, comment, and document marker cleanup, allowing crafted input to make parsing hang for an arbitrarily long time. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.

Affected (CNA)

Vendor / productVersions
symfony / symfonyaffected < 5.4.52; affected >= 6.0.0-BETA1, < 6.4.40; affected >= 7.0.0-BETA1, < 7.4.12; affected >= 8.0.0-BETA1, < 8.0.12
symfony / yamlaffected < 5.4.52; affected >= 6.0.0-BETA1, < 6.4.40; affected >= 7.0.0-BETA1, < 7.4.12; affected >= 8.0.0-BETA1, < 8.0.12

CWE

CWE-1333

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.