TI-2023-17995 Aliases CVE-2023-35933 GHSA-hr9r-8phq-5x8j

OpenFGA denial of service die to circular relationship

HIGH 66CWE-835Published 2023-06-26 · Updated 2024-12-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-835.

Summary

OPenFGA is an open source authorization/permission engine built for developers. OpenFGA versions v1.1.0 and prior are vulnerable to a DoS attack when Check and ListObjects calls are executed against authorization models that contain circular relationship definitions. Users are affected by this vulnerability if they are using OpenFGA v1.1.0 or earlier, and if you are executing `Check` or `ListObjects` calls against a vulnerable authorization model. Users are advised to upgrade to version 1.1.1. There are no known workarounds for this vulnerability. Users that do not have circular relationships in their models are not affected.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.01133 66th percentileScored 2026-11-07

Public exploit Yes 2 exploit referencesTagged by NVD

Fix Fixed openfga (openfga): 1.1.1github.com/openfga/openfga (Go): 1.1.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
openfga	openfga	before 1.1.1	1.1.1	Patch available	CNA
—	github.com/openfga/openfga (Go)	before 1.1.1	1.1.1	Patch available	GHSA-hr9r-8phq-5x8j

openfga Vendoropenfga Affected before 1.1.1 Fixed in 1.1.1 Patch available CNA
github.com/openfga/openfga (Go) Vendor— Affected before 1.1.1 Fixed in 1.1.1 Patch available GHSA-hr9r-8phq-5x8j

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:openfga:openfga::::::::	before 1.1.1	Vulnerable	openfga

cpe:2.3:a:openfga:openfga:*:*:*:*:*:*:*:* Versions before 1.1.1 Vulnerable ·openfga

Remediation

Fix · CNA openfga (openfga) Fixed in 1.1.1
Fix · GHSA-hr9r-8phq-5x8j github.com/openfga/openfga (Go) Fixed in 1.1.1 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2023-35933
2026-10-03 Alias added: GHSA-hr9r-8phq-5x8j

References

Exploit 2

Patch 1

https://github.com/openfga/openfga/commit/087ce392595f3c319ab3028b5089118ea4063452

Advisory 2

Other 1

https://github.com/openfga/openfga

TI-2024-28441 OpenFGA Authorization Bypass CVSS 3.1CRITICAL 9.8
TI-2022-07597 OpenFGA Authorization Bypass CVSS 3.1CRITICAL 9.8
TI-2024-20816 OpenFGA Authorization Bypass CVSS 3.1CRITICAL 9.8
TI-2022-18717 OpenFGA Authorization Bypass CVSS 3.1CRITICAL 9.8
TI-2022-18716 OpenFGA Authorization Bypass CVSS 3.1CRITICAL 9.8
TI-2022-18727 OpenFGA Authorization Bypass CVSS 3.1CRITICAL 9.8

See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences