by Kastro
Paper/Archive/CVE-2026-33729

CVE-2026-33729

openfga openfga — OpenFGA has an Authorization Bypass through cached keys

EPSS 0.3%CVSS 9.8
critical.is priorityof 100
33
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 16.4.165 × 203.3No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
openfga< 1.13.1–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)5.8CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

refgithub.com/openfga/openfga/security/advisories/GHSA-h6c8-cww8-35hfrefgithub.com/openfga/openfga/commit/049b50ccd2cc7e163bd897f3d17a7b859ad146f8refgithub.com/openfga/openfga/releases/tag/v1.13.1