CVE-2026-107376
HighCVSS 8.2Exploitation Probability (EPSS)
Low risk37th percentile - higher than 37% of all known CVEs
Summary
webonyx graphql-php prior to 15.32.3 has a stack exhaustion vulnerability in GraphQL\Language\Parser, which performs recursive descent without a recursion limit in parseSelectionSet, parseValueLiteral, and parseTypeReference. A remote attacker can submit deeply nested selection sets, object or list values, or list types that exhaust the PHP process stack during pre-validation parsing. The resulting SIGSEGV can terminate PHP-FPM workers or long-running processes.
Risk Assessment
An attacker can cause PHP process crashes, leading to denial of service.
Recommendation
It is recommended to upgrade graphql-php to version 15.32.3 or later.
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Original NVD description (English source)
webonyx graphql-php is a PHP implementation of the GraphQL specification. Prior to 15.32.3, GraphQL\Language\Parser performs recursive descent without a recursion limit in parseSelectionSet, parseValueLiteral, and parseTypeReference. A remote attacker can submit deeply nested selection sets, object or list values, or list types that exhaust the PHP process stack during pre-validation parsing, before query validation and complexity controls run. The resulting SIGSEGV can terminate PHP-FPM workers or long-running Swoole, RoadRunner, ReactPHP, or CLI processes and cannot be caught by application-level exception handling. This issue is fixed in version 15.32.3.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS