What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-27 · updated 2026-06-17
• Weakness: CWE-20

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.

Affected products

• openfga: before 1.13.1 — fixed in 1.13.1

How to fix

Upgrade to a fixed version: openfga 1.13.1. Check the vendor advisory for mitigations.

References

• https://github.com/openfga/openfga/commit/049b50ccd2cc7e163bd897f3d17a7b859ad146f8
• https://github.com/openfga/openfga/releases/tag/v1.13.1
• https://github.com/openfga/openfga/security/advisories/GHSA-h6c8-cww8-35hf

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