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.
Analysis
No analysis available yet.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| symfony | symfony | affected |
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| symfony | yaml | affected |
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Remediation
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Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
 Debian DSA |
DSA-6312-1 | symfony security update |
| Debian DSA |
DSA-6317-1 | symfony security update |
 Github GHSA |
GHSA-9frc-8383-795m | Symfony's YAML Parser has a ReDoS via Catastrophic Backtracking in Parser::cleanup() Regex |
References
History
Tue, 14 Jul 2026 19:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Symfony: YAML Parser ReDoS via Catastrophic Backtracking in Parser::cleanup() Regex | |
| Weaknesses | CWE-1333 | |
| References |
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| Metrics |
cvssV4_0
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-14T18:50:14.830Z
Reserved: 2026-05-11T20:14:43.202Z
Link: CVE-2026-45305
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
No data.
Weaknesses
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CWE-1333
Inefficient Regular Expression Complexity