CVE-2026-80051

Summary

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.

Affected Software

Weaknesses

• CWE-1287: CWE-1287 Improper Validation of Specified Type of Input

Workarounds

Decode GraphQL variables with a deserializer that enforces a maximum nesting depth (Go's standard encoding/json does), which mitigates the stack-overflow condition. There is no library-level workaround for the type-confusion condition short of application-side validation of scalar arguments or a custom scalar; upgrading once a fix ships is the durable remedy.

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/graphql-go/graphql/blob/v0.8.1/scalars.go#L307-L315
• https://www.openwall.com/lists/oss-security/2026/08/25/2

• ←Previous
• Next→