# CVE-2026-80051

## Summary

- **CVE ID:** CVE-2026-80051
- **Severity:** MEDIUM
- **CVSS Score:** 5.9 (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)
- **CWE:** CWE-1287
- **Published:** Aug 25, 2026
- **Last Modified:** 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.

## Affected Products

- graphql-go project — graphql-go (0)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.13%
- **EPSS Percentile:** 3.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._