High 8.2Published Oct 8, 2026

CVE-2026-107376webonyx graphql-php: Unbounded recursion in parser causes stack overflow on crafted nested input

Updated under an hour ago (Oct 27, 2026, 11:50 PM ET)

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It affects webonyx graphql-php. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.45%, higher than 38% of scored CVEs.

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Every CVE for webonyx graphql-php

Exploited in the last 30 days

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.

CVSS: 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Weakness (CWE): CWE-674
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.45% (percentile 38)
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

webonyx graphql-php webonyx:graphql_php (from the name)	before 15.32.3	CNA record

References

References

https://github.com/webonyx/graphql-php/security/advisories/GHSA-r7cg-qjjm-xhqq	x-refsource-confirm
https://github.com/webonyx/graphql-php/commit/6c1d6009a0f7557f66753bcfd07badd15acf77f4	x-refsource-misc
https://github.com/webonyx/graphql-php/commit/7b7f2080ca5f7d5340a696fc5701b19a9222d2c2	x-refsource-misc
https://github.com/webonyx/graphql-php/releases/tag/v15.32.3	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.