CVE-2023-40579Network attack vector

Authorization bypass via incorrect ListObjects evaluation

Published Aug 25, 2023 · Updated Oct 1, 2024

Improper access control in OpenFGA before 1.3.1 allows remote authenticated users to retrieve unauthorized objects through ListObjects. The ListObjects evaluator over-includes results when it resolves authorization models containing a rel1 from type1 expression. Reachability requires access to that API and an affected model; the bounded consequence is disclosure of object identifiers beyond the requester's permissions.

CVSS severity6.5
Medium
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in OpenFGA before 1.3.1 allows remote authenticated users to retrieve unauthorized objects through ListObjects. The ListObjects evaluator over-includes results when it resolves authorization models containing a rel1 from type1 expression. Reachability requires access to that API and an affected model; the bounded consequence is disclosure of object identifiers beyond the requester's permissions.

The record

CVE
CVE-2023-40579
Published
Aug 25, 2023
Updated
Oct 1, 2024
Vendor
OpenFGA
Product
OpenFGA
Classifications
CWE-284
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=< 1.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenFGA · OpenFGAversion=< 1.3.1

Published CVSS scores

6.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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