Medium severity · published Jul 9, 2026
CVE-2026-55170
OpenFGA MySQL backend: case-insensitive collation on identifier columns causes incorrect authorization decisions
5.4
CVSS
0.3%
EPSS
No
On KEV
Description
OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, when MySQL is being used as the datastore and authorization decisions rely on case-sensitive user strings, the tuple, changelog, and authorization_model identifier columns can compare case-distinct values such as user:Alice and user:alice as equivalent, causing two distinct check requests to return the same response. This issue is fixed in 1.18.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openfga · openfga
< 1.18.0 · source: vendor, NVD
HC
Helm Charts · Openfga
before 0.3.9 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-55170
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-55170
Patch
https://github.com/openfga/helm-charts/commit/96d5517a2693ff5def451dee7d6b9d1baeb281f8
Product
https://github.com/openfga/helm-charts/releases/tag/openfga-0.3.9
Patch
https://github.com/openfga/openfga/commit/a2e0dbefc3e01a95c785f81a3563bc6571b08b11
Product
https://github.com/openfga/openfga/releases/tag/v1.18.0
Vendor Advisory
https://github.com/openfga/openfga/security/advisories/GHSA-cf98-j28v-49v6
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