CVE-2025-55213
OpenFGA Authorization Bypass (Check)
OpenFGA is a high-performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar. OpenFGA v1.9.3 to v1.9.4 ( openfga-0.2.40 <= Helm chart <= openfga-0.2.41, v1.9.3 <= docker <= v.1.9.4) are vulnerable to improper policy enforcement when certain Check and ListObject calls are executed. This vulnerability is fixed in 1.9.5.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
OpenFGA Authorization Bypass (Check)
OpenFGA is a high-performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar. OpenFGA v1.9.3 to v1.9.4 ( openfga-0.2.40 <= Helm chart <= openfga-0.2.41, v1.9.3 <= docker <= v.1.9.4) are vulnerable to improper policy enforcement when certain Check and ListObject calls are executed. This vulnerability is fixed in 1.9.5.
- Record
CVE-2025-55213- CVSS 4.0
- 5.8 Medium
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H - Weakness
- CWE-863
- Updated
- 2026-11-02
EUVDEUVD-2025-25151
OpenFGA is a high-performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar. OpenFGA v1.9.3 to v1.9.4 ( openfga-0.2.40 <= Helm chart <= openfga-0.2.41, v1.9.3 <= docker <= v.1.9.4) are vulnerable to improper policy enforcement when certain Check and ListObject calls are executed. This vulnerability is fixed in 1.9.5.
- Record
EUVD-2025-25151- CVSS 4.0
- 5.8 Medium
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-mgh9-4mwp-fg55
OpenFGA Authorization Bypass
Overview
OpenFGA v1.9.3 to v1.9.4 ( openfga-0.2.40 <= Helm chart <= openfga-0.2.41, v1.9.3 <= docker <= v.1.9.4) are vulnerable to improper policy enforcement when certain Check and ListObject calls are executed.
Am I Affected?
You are affected by this vulnerability if you are using OpenFGA v1.9.3 to v1.9.4, specifically under the following preconditions:
- Calling Check API or ListObjects with an authorization model that has a relationship directly assignable by more than 1 userset with same type, and
- There are check or list object queries that rely on the above relationship, and
- You have userset tuples that are assigned to the above relationship
Fix
Upgrade to v1.9.5. This upgrade is backwards compatible.
Workaround
Downgrade to v1.9.2 with enable-check-optimizations removed from OPENFGA_EXPERIMENTALS
Acknowledgments
OpenFGA would like Dominic Harries and rrozza-apolitical to thank for discovering this vulnerability.
- Record
GHSA-mgh9-4mwp-fg55- CVSS 4.0
- 5.8 Medium
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H - Weakness
- CWE-863
- Updated
- 2026-11-02
NVD
OpenFGA is a high-performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar. OpenFGA v1.9.3 to v1.9.4 ( openfga-0.2.40 <= Helm chart <= openfga-0.2.41, v1.9.3 <= docker <= v.1.9.4) are vulnerable to improper policy enforcement when certain Check and ListObject calls are executed. This vulnerability is fixed in 1.9.5.
- Record
CVE-2025-55213- CVSS 4.0
- 5.8 Medium
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-863
- Updated
- 2026-11-02
OSV
OpenFGA Authorization Bypass (Check)
OpenFGA is a high-performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar. OpenFGA v1.9.3 to v1.9.4 ( openfga-0.2.40 <= Helm chart <= openfga-0.2.41, v1.9.3 <= docker <= v.1.9.4) are vulnerable to improper policy enforcement when certain Check and ListObject calls are executed. This vulnerability is fixed in 1.9.5.
- Record
CVE-2025-55213- CVSS 4.0
- 5.8 Medium
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H - Weakness
- CWE-863
- Updated
- 2026-11-02
OSVGHSA-mgh9-4mwp-fg55
OpenFGA Authorization Bypass
Overview
OpenFGA v1.9.3 to v1.9.4 ( openfga-0.2.40 <= Helm chart <= openfga-0.2.41, v1.9.3 <= docker <= v.1.9.4) are vulnerable to improper policy enforcement when certain Check and ListObject calls are executed.
Am I Affected?
You are affected by this vulnerability if you are using OpenFGA v1.9.3 to v1.9.4, specifically under the following preconditions:
- Calling Check API or ListObjects with an authorization model that has a relationship directly assignable by more than 1 userset with same type, and
- There are check or list object queries that rely on the above relationship, and
- You have userset tuples that are assigned to the above relationship
Fix
Upgrade to v1.9.5. This upgrade is backwards compatible.
Workaround
Downgrade to v1.9.2 with enable-check-optimizations removed from OPENFGA_EXPERIMENTALS
Acknowledgments
OpenFGA would like Dominic Harries and rrozza-apolitical to thank for discovering this vulnerability.
- Record
GHSA-mgh9-4mwp-fg55- CVSS 4.0
- 5.8 Medium
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H - Weakness
- CWE-863
- Updated
- 2026-11-02
OSVGO-2025-3894 No score
OpenFGA Authorization Bypass in github.com/openfga/openfga
OpenFGA Authorization Bypass in github.com/openfga/openfga
- Record
GO-2025-3894- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/openfga/openfgaGo |
1.9.3 up to 1.9.5 | 1.9.5 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-55213 is a medium vulnerability (CVSS 5.8) in Openfga, published August 18, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.32%, the 25th percentile. Fixed in github.com/openfga/openfga 1.9.5.
References
github.com/openfga/openfga/security/advisories/GHSA-mgh9-4mwp-fg55
nvd.nist.gov/vuln/detail/CVE-2025-55213
pkg.go.dev/vuln/GO-2025-3894