CVE-2023-43645— Denial of service from circular relationship definitions in OpenFGA
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I. Basic Information for CVE-2023-43645
Vulnerability Information
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Vulnerability Title
Denial of service from circular relationship definitions in OpenFGA
Source: NVD (National Vulnerability Database)
Vulnerability Description
OpenFGA is an authorization/permission engine built for developers and inspired by Google Zanzibar. OpenFGA is vulnerable to a denial of service attack when certain Check calls are executed against authorization models that contain circular relationship definitions. When the call is made, it's possible for the server to exhaust resources and die. Users are advised to upgrade to v1.3.2 and update any offending models. There are no known workarounds for this vulnerability. Note that for models which contained cycles or a relation definition that has the relation itself in its evaluation path, checks and queries that require evaluation will no longer be evaluated on v1.3.2+ and will return errors instead. Users who do not have cyclic models are unaffected.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
不可达退出条件的循环(无限循环)
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenFGA 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenFGA是OpenFGA的为开发人员构建并受 Google Zanzibar 启发的高性能和灵活的授权/许可引擎。 OpenFGA 1.3.1之前版本存在安全漏洞，该漏洞源于当针对包含循环关系定义的授权模型执行某些 Check 调用时，OpenFGA 很容易受到拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2023-43645
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- https://github.com/openfga/openfga/security/advisories/GHSA-2hm9-h873-pgqhx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2023-43645
IV. Related Vulnerabilities
Same product: openfga
- CVE-2026-41131
OpenFGA has Improper Policy Enforcement - CVE-2026-40293
OpenFGA Playground Preshared Key Exposure - CVE-2026-34972
OpenFGA's BatchCheck within-request deduplication produces i - CVE-2026-33729
OpenFGA has an Authorization Bypass through cached keys - CVE-2026-24851
OpenFGA Improper Policy Enforcement
Same vendor: openfga
- CVE-2026-41131
OpenFGA has Improper Policy Enforcement - CVE-2026-40293
OpenFGA Playground Preshared Key Exposure - CVE-2026-34972
OpenFGA's BatchCheck within-request deduplication produces i - CVE-2026-33729
OpenFGA has an Authorization Bypass through cached keys - CVE-2026-24851
OpenFGA Improper Policy Enforcement
Same weakness: CWE-835
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Pillow: PDF Parsing Trailer Infinite Loop (DoS) - CVE-2026-41511
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Loop with Unreachable Exit Condition ('Infinite Loop') in Wi - CVE-2026-6536
Loop with Unreachable Exit Condition ('Infinite Loop') in Wi - CVE-2026-6534
Loop with Unreachable Exit Condition ('Infinite Loop') in Wi
V. Comments for CVE-2023-43645
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