CVE-2022-39342Network attack vector

Authorization bypass via rewritten tupleset validation

Published Oct 25, 2022 · Updated Apr 23, 2025

Improper authorization in OpenFGA 0.2.3 and earlier allows remote attackers to bypass relationship-based access checks. The authorization-model validator accepts a relation used as a tuple-to-userset tupleset after confirming only that the relation exists, without requiring the direct “this” rewrite. Exposure requires a model whose from clause uses a rewritten, rather than direct, tupleset relation; affected checks can grant access that the model should deny.

CVSS severity9.8
Critical
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper authorization in OpenFGA 0.2.3 and earlier allows remote attackers to bypass relationship-based access checks. The authorization-model validator accepts a relation used as a tuple-to-userset tupleset after confirming only that the relation exists, without requiring the direct “this” rewrite. Exposure requires a model whose from clause uses a rewritten, rather than direct, tupleset relation; affected checks can grant access that the model should deny.

The record

CVE
CVE-2022-39342
Published
Oct 25, 2022
Updated
Apr 23, 2025
Vendor
OpenFGA
Product
OpenFGA
Classifications
CWE-285, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenFGA · OpenFGAversion=< 0.2.4

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo