CVE-2024-23820: OpenFGA DoS

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-01-26 · updated 2026-06-17
Weakness: CWE-770

Description

OpenFGA, an authorization/permission engine, is vulnerable to a denial of service attack in versions prior to 1.4.3. In some scenarios that depend on the model and tuples used, a call to `ListObjects` may not release memory properly. So when a sufficiently high number of those calls are executed, the OpenFGA server can create an `out of memory` error and terminate. Version 1.4.3 contains a patch for this issue.

Affected products

openfga: before 1.4.3 — fixed in 1.4.3

How to fix

Upgrade to a fixed version: openfga 1.4.3. Check the vendor advisory for mitigations.

References

https://github.com/openfga/openfga/commit/908ac85c8b7769c8042cca31886df8db01976c39
https://github.com/openfga/openfga/releases/tag/v1.4.3
https://github.com/openfga/openfga/security/advisories/GHSA-rxpw-85vw-fx87
https://github.com/openfga/openfga/commit/908ac85c8b7769c8042cca31886df8db01976c39
https://github.com/openfga/openfga/releases/tag/v1.4.3
https://github.com/openfga/openfga/security/advisories/GHSA-rxpw-85vw-fx87

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