CVE-2026-45305
Severity CVSS v4.0:
HIGH
Type:
Unavailable / Other
Publication date:
14/07/2026
Last modified:
15/07/2026
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, 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.
Impact
Base Score 4.0
8.70
Severity 4.0
HIGH
Base Score 3.x
7.50
Severity 3.x
HIGH
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* | 5.4.52 (excluding) | |
| cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* | 6.0.0 (including) | 6.4.40 (excluding) |
| cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* | 7.0.0 (including) | 7.4.12 (excluding) |
| cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* | 8.0.0 (including) | 8.0.12 (excluding) |
To consult the complete list of CPE names with products and versions, see this page
References to Advisories, Solutions, and Tools
- https://github.com/symfony/symfony/commit/9749cd43c5e09b3735093623670b21b9d8a056cb
- https://github.com/symfony/symfony/releases/tag/v5.4.52
- https://github.com/symfony/symfony/releases/tag/v6.4.40
- https://github.com/symfony/symfony/releases/tag/v7.4.12
- https://github.com/symfony/symfony/releases/tag/v8.0.12
- https://github.com/symfony/symfony/security/advisories/GHSA-9frc-8383-795m