CVE-2026-45305

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/symfony/symfony/commit/9749cd43c5e09b3735093623670b21b9d8a056cb	Patch
https://github.com/symfony/symfony/releases/tag/v5.4.52	Product Release Notes
https://github.com/symfony/symfony/releases/tag/v6.4.40	Product Release Notes
https://github.com/symfony/symfony/releases/tag/v7.4.12	Product Release Notes
https://github.com/symfony/symfony/releases/tag/v8.0.12	Product Release Notes
https://github.com/symfony/symfony/security/advisories/GHSA-9frc-8383-795m	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:sensiolabs:symfony::::::::
	cpe:2.3:a:sensiolabs:symfony::::::::
	cpe:2.3:a:sensiolabs:symfony::::::::
	cpe:2.3:a:sensiolabs:symfony::::::::

History

No history.

Information

Published : 2026-07-14 19:17

Updated : 2026-07-15 14:57

NVD link : CVE-2026-45305

Mitre link : CVE-2026-45305

CVE.ORG link : CVE-2026-45305

JSON object : View

Products Affected

sensiolabs

symfony

CWE

CWE-1333

Inefficient Regular Expression Complexity

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