CVE-2026-80051

State: Published
Severity: 5.9 Medium
Published: Aug 25, 2026
Updated: Aug 25, 2026
Reserved: Aug 25, 2026

Description

github.com/graphql-go/graphql (GraphQL for Go) through 0.8.1 does not validate that a scalar variable value matches its declared type. The built-in coerceString and coerceBool functions (scalars.go) accept input whose type does not match the declared String, ID, or Boolean scalar instead of raising the request error that the GraphQL specification mandates. In some cases (but not any typical case of JSON sent to a website), a deeply nested value leads to an unrecoverable "fatal error: stack overflow" condition.

Scores

CVSS	Score	Vector	Source
4.0	5.9 Medium	CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	mitre

Weaknesses

CWE-1287 Improper Validation of Specified Type of Input

Affected Products

Product	Versions
graphql-gographql-go project	0.8.1 and earlierAffected

References

https://github.com/graphql-go/graphql/blob/v0.8.1/scalars.go#L307-L315technical-description
https://www.openwall.com/lists/oss-security/2026/08/25/2exploit

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