What’s Vulnerable › Vulnerabilities

CVE-2026-55170: OpenFGA MySQL backend: case-insensitive collation on identifier columns causes incorrect authorization decisions

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-09 · updated 2026-07-14
• Weakness: CWE-178

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.

Affected products

• openfga Helm Charts: before 0.3.9 — fixed in 0.3.9
• openfga: before 1.18.0 — fixed in 1.18.0

How to fix

Upgrade to a fixed version: openfga Helm Charts 0.3.9; openfga 1.18.0. Check the vendor advisory for mitigations.

References

• https://github.com/openfga/helm-charts/commit/96d5517a2693ff5def451dee7d6b9d1baeb281f8
• https://github.com/openfga/helm-charts/releases/tag/openfga-0.3.9
• https://github.com/openfga/openfga/commit/a2e0dbefc3e01a95c785f81a3563bc6571b08b11
• https://github.com/openfga/openfga/releases/tag/v1.18.0
• https://github.com/openfga/openfga/security/advisories/GHSA-cf98-j28v-49v6

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