CVE-2026-55170: openfga — Fix

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.

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CVSS v3.1 Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS — Exploit Prediction

0.0025

Probability of exploitation

0.16%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-178 CWE-178

Affected Products

Vendor	Product	Versions
openfga	helm_charts	< 0.3.9
openfga	openfga	< 1.18.0

References

Advisories & Patches

https://github.com/openfga/helm-charts/commit/96d5517a2693ff5def451dee7d6b9d1baeb281f8 https://github.com/openfga/openfga/commit/a2e0dbefc3e01a95c785f81a3563bc6571b08b11 https://github.com/openfga/openfga/security/advisories/GHSA-cf98-j28v-49v6

Other References

https://github.com/openfga/helm-charts/releases/tag/openfga-0.3.9 https://github.com/openfga/openfga/releases/tag/v1.18.0

Frequently Asked Questions

What is CVE-2026-55170? +

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. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2026-55170? +

CVE-2026-55170 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0025, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-55170? +

CVE-2026-55170 affects products from openfga, specifically: helm_charts, openfga. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-55170? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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