GitHub Advisoryadvisory · Go

GHSA-h6c8-cww8-35hf OpenFGA has an Authorization Bypass through cached keys

MEDIUM Published 2026-03-26 Modified 2026-03-27 Official page ↗
Aliases
CVE-2026-33729
Ecosystem
Go
Packages
github.com/openfga/openfga
Severity
Moderate
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
Weaknesses
CWE-1289, CWE-20, CWE-345
Reviewed
2026-03-26

Affected packages

• Go github.com/openfga/openfga: < 1.13.1 → fixed in 1.13.1

Description

Description In OpenFGA, under specific conditions, models using conditions with caching enabled can result in two different check requests producing the same cache key. This can result in OpenFGA reusing an earlier cached result for a different request. Am I Affected? Users are affected if the following preconditions are met: 1. The model has relations which rely on condition evaluation. 1. Caching is enabled. Fix Upgrade to OpenFGA v1.13.1. Acknowledgement OpenFGA would like to thank @Amemoyoi for the discovery and responsible disclosure.

Related

Alias · CVE (1)

  • CVE-2026-33729 OpenFGA is a high-performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar. vulnerability

Weakness · CWE (3)

  • CWE-1289 Improper Validation of Unsafe Equivalence in Input weakness
  • CWE-20 Improper Input Validation weakness
  • CWE-345 Insufficient Verification of Data Authenticity weakness

References