Type Confusion in graphql-ruby - #VU162673
Published: November 9, 2026
Vulnerability identifier: #VU162673
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-843
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an attacker to supply an object of an unintended type to a GraphQL-Ruby argument.
The vulnerability exists due to missing type validation when loads: references an Object type absent from schema return types, including members of returned Interface or Union types. An attacker can submit an ID resolving to a different type and have that object accepted instead of the required type.
Affected software
graphql-ruby
Remediation
Install security update from vendor's website.
graphql-ruby - update to 2.6.11