Analysis
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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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No data available yet.
No remediation available yet.
Tracking
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| Source | ID | Title |
|---|---|---|
 Debian DSA |
DSA-6312-1 | symfony security update |
| Debian DSA |
DSA-6317-1 | symfony security update |
 Github GHSA |
GHSA-4qpc-3hr4-r2p4 | Symfony's YAML Parser Vulnerable to Exponential Memory Allocation via Recursive Collection-Alias Expansion ("Billion Laughs") |
Tue, 14 Jul 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
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 resolved YAML collection aliases recursively, allowing a small untrusted YAML input to expand into a multi-gigabyte structure and exhaust memory. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12. | |
| Title | Symfony: YAML Parser Exponential Memory Allocation via Recursive Collection-Alias Expansion ("Billion Laughs") | |
| Weaknesses | CWE-776 | |
| 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: 2026-07-14T19:13:39.323Z
Reserved: 2026-05-11T20:14:43.202Z
Link: CVE-2026-45304
Vulnrichment
Updated: 2026-07-14T19:13:34.393Z
NVD
No data.
Redhat
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OpenCVE Enrichment
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CWE-776
Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')