Vulnerability · Published Mar 27, 2026 · Assigned by GitHub_M
CVE-2026-33729OpenFGA has an Authorization Bypass through cached keys
Medium 5.8
In plain English
A medium-severity improper input validation in openfga from openfga. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/openfga/openfga | 1.13.1 | GHSA-h6c8-cww8-35hf |
| Go | github.com/openfga/openfga | 1.13.1 | GO-2026-4857 |
Affected products (as reported)
Weakness: CWE-20, CWE-345, CWE-1289 · 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
References
- https://github.com/openfga/openfga/security/advisories/GHSA-h6c8-cww8-35hf x_refsource_CONFIRM
- https://github.com/openfga/openfga/commit/049b50ccd2cc7e163bd897f3d17a7b859ad146f8 x_refsource_MISC
- https://github.com/openfga/openfga/releases/tag/v1.13.1 x_refsource_MISC