CVE-2026-33729 OpenFGA has an Authorization Bypass through cached keys

What is CVE-2026-33729?

CVE-2026-33729 is a medium-severity authentication bypass vulnerability in openfga, published on 27 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

OpenFGA is a high-performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar. In versions prior to 1.13.1, 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. Users are affected if the model has relations which rely on condition evaluation andncaching is enabled. OpenFGA v1.13.1 contains a patch.

Weakness: CWE-20, CWE-345, CWE-1289

Which versions are affected by CVE-2026-33729?

3 open source packages ship an affected version, including github.com/openfga/openfga. It affects 1 product.

Products include Openfga Openfga.

How do I fix CVE-2026-33729?

Upgrade github.com/openfga/openfga to 1.13.1 or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-33729 being exploited?

There is no known exploitation of CVE-2026-33729 in the wild and no public exploit code.

Other vulnerabilities in openfga

• CVE-2024-31452 OpenFGA Authorization Bypass High 8.1
• CVE-2022-23542 OpenFGA Authorization Bypass High 7.7
• CVE-2024-42473 OpenFGA Authorization Bypass High 7.5
• CVE-2026-40293 OpenFGA Playground Preshared Key Exposure Medium 6.5
• CVE-2023-40579 OpenFGA Authorization Bypass Medium 6.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-h6c8-cww8-35hf, GO-2026-4857, MINI-2p27-m3mg-6hvq, MINI-2vmx-x97v-52c4, MINI-6mp2-jr44-r353, MINI-6x6q-7874-7fph and 14 more.