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CVE-2026-33729 — Vulnerability in github.com/openfga/openfga — CVE...

MEDIUM

OpenFGA has an Authorization Bypass through cached keys

Published March 26, 2026Updated September 10, 2026Source: osv

Summary

### 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.

Advisory Timeline

  • First published March 26, 2026 (200 days ago).
  • Last revised September 10, 2026 — 167 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Go
Update github.com/openfga/openfga to 1.13.1 or later
go get github.com/openfga/openfga@v1.13.1

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: go (1).

PackageEcosystemAffectedFixed In
github.com/openfga/openfga
go
All versions1.13.1

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
—
Confidentiality
—
Integrity
—
Availability
—

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

References

Frequently Asked Questions

What is CVE-2026-33729?
OpenFGA has an Authorization Bypass through cached keys This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 9.5/10).
How do I check if my project is affected by CVE-2026-33729?
CVE-2026-33729 affects github.com/openfga/openfga. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-33729 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.5

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-h6c8-cww8-35hf
GO-2026-4857

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