Type Validation Vulnerability in GraphQL for Go by GitHub
CVE-2026-80051

5.9MEDIUM

Key Information:

Vendor

Graphql-go Project

Status
Graphql-go
Vendor
CVE Published:
25 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-80051?

The GraphQL for Go library, up to version 0.8.1, contains a vulnerability that fails to validate scalar variable values against their declared types. Specifically, the built-in functions coerceString and coerceBool do not enforce type checking, allowing improperly typed input. This oversight can lead to severe consequences, such as a stack overflow error when handling deeply nested data, which deviates from the error handling standards set by the GraphQL specification. Proper validation is crucial for ensuring data integrity and preventing unexpected behaviors.

Affected Version(s)

graphql-go 0 <= 0.8.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-80051 - Proof of Concept

References

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

CVSS V4

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.