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Symfony: Unbounded Recursion in the YAML Inline Lexer Lets a Single Document Crash the Process

🗓️ 27 Oct 2026 19:01:50Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 13 Views

Unbounded recursion in Symfony YAML inline lexer allows a document to crash the process.

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Node
OR
symfonyyamlRange8.0.0–8.1.6composer
symfonyyamlRange7.0.0–7.4.18composer
symfonyyamlRange6.0.0–6.4.45composer
symfonyyamlRange2.0.0–5.4.54composer
symfonysymfonyRange8.0.0–8.1.6composer
symfonysymfonyRange7.0.0–7.4.18composer
symfonysymfonyRange6.0.0–6.4.45composer
symfonysymfonyRange2.0.0–5.4.54composer

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27 Oct 2026 19:01Current
6Medium risk
Vulners AI Score6
CVSS 48.7
EPSS0.00395
SSVC
13