CVE-2026-45304
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| symfony | symfony | < 5.4.52 | affected |
| symfony | symfony | >= 6.0.0-BETA1, < 6.4.40 | affected |
| symfony | symfony | >= 7.0.0-BETA1, < 7.4.12 | affected |
| symfony | symfony | >= 8.0.0-BETA1, < 8.0.12 | affected |
| symfony | yaml | < 5.4.52 | affected |
| symfony | yaml | >= 6.0.0-BETA1, < 6.4.40 | affected |
| symfony | yaml | >= 7.0.0-BETA1, < 7.4.12 | affected |
| symfony | yaml | >= 8.0.0-BETA1, < 8.0.12 | affected |
Weaknesses
- CWE-776: CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- https://github.com/symfony/symfony/security/advisories/GHSA-4qpc-3hr4-r2p4
- https://github.com/symfony/symfony/commit/e77391b2e4f18821198f010d573674c8ed4a970a
- 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
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