Vulnerability in Webonyx Graphql-Php
CVE-2026-107376
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Webonyx Graphql-Php — versions < 15.32.3
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-107376?
- CVE-2026-107376 is a high-severity vulnerability in Webonyx Graphql-Php, classified under Uncontrolled Recursion. CVSS score: 8.2/10. Published 2026-10-08.
- How severe is CVE-2026-107376?
- High severity. CVSS v3 base score is 8.2 out of 10.