CVE-2026-34972

OpenFGA's BatchCheck within-request deduplication produces incorrect authorization decisions via list-value cache-key collision

State: Published
Severity: 5.0 Medium
Published: Apr 6, 2026
Updated: Apr 7, 2026
Reserved: Mar 31, 2026

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Description

OpenFGA is a high-performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar. From 1.8.0 to 1.13.1, under specific conditions, BatchCheck calls with multiple checks sent for the same object, relation, and user combination can result in improper policy enforcement. This vulnerability is fixed in 1.14.0.

Scores

CVSS	Score	Vector	Source
3.1	5.0 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L	GitHub_M

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
openfgaopenfga	>= 1.8.0, < 1.14.0Affected

References

https://github.com/openfga/openfga/security/advisories/GHSA-jwvj-g8pc-cx45

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