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

What is CVE-2026-55170?

CVE-2026-55170 is a low-severity authentication bypass vulnerability in openfga, published on 9 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-178

Which versions are affected by CVE-2026-55170?

3 open source packages ship an affected version, including github.com/openfga/openfga. It affects 2 products.

Products include Openfga Helm Charts, Openfga Openfga.

How do I fix CVE-2026-55170?

Upgrade github.com/openfga/openfga to 1.18.0 or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-55170 being exploited?

There is no known exploitation of CVE-2026-55170 in the wild and no public exploit code.

Other vulnerabilities in openfga

• CVE-2026-55689 OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset Medium 6.8
• CVE-2026-24851 OpenFGA Improper Policy Enforcement Medium 5.8
• CVE-2025-64751 OpenFGA Improper Policy Enforcement Medium 5.8
• CVE-2025-55213 OpenFGA Authorization Bypass (Check) Medium 5.8
• CVE-2025-48371 OpenFGA Authorization Bypass Medium 5.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CLEANSTART-2026-GZ01306, CLEANSTART-2026-IY19644, CLEANSTART-2026-YO15719, CLEANSTART-2026-ZO68951, ECHO-d475-f680-bede, GHSA-cf98-j28v-49v6 and 19 more.