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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-107376
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-08 18:17:22 UTC
Updated2026-10-08 21:34:48 UTC
Descriptionwebonyx 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.

Risk And Classification

Primary CVSS: v3.1 8.2 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

EPSS: 0.004490000 probability, percentile 0.370900000 (date 2026-10-10)

Problem Types: CWE-674 | CWE-674 CWE-674: Uncontrolled Recursion

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
3.1CNADECLARED8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Webonyx Graphql-php affected < 15.32.3 Not specified

References

ReferenceSourceLinkTags
github.com/webonyx/graphql-php/commit/7b7f2080ca5f7d5340a696fc5701b19a92... [email protected] github.com
github.com/webonyx/graphql-php/commit/6c1d6009a0f7557f66753bcfd07badd15a... [email protected] github.com
github.com/webonyx/graphql-php/security/advisories/GHSA-r7cg-qjjm-xhqq 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/webonyx/graphql-php/releases/tag/v15.32.3 [email protected] github.com
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