CVE-2026-33729

OpenFGA has an Authorization Bypass through cached keys

State: Published
Severity: 5.8 Medium
Published: Mar 27, 2026
Updated: Mar 30, 2026
Reserved: Mar 23, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.8 Medium	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	GitHub_M

Weaknesses

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

Affected Products

Product	Versions
openfgaopenfga	< 1.13.1Affected

References

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