CVE-2026-55170

Updated on 18 Jun 2026

Severity

5.4 Medium severity

Details

CVSS score
5.4
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/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

Overview

About vulnerability

Description

In OpenFGA, when MySQL is being used as the datastore, two distinct check requests can return the same response.

Preconditions

This applies if the following preconditions are met:

  1. You run OpenFGA with MySQL as the datastore
  2. Your authorization decisions rely on case-sensitive user strings.

Fix

Upgrade to OpenFGA 1.18.0 or greater.

Acknowledgements

OpenFGA would like to thank @sahajamoth for the detailed report.

Details

Affected product:
Grafana , openfga/openfga
Affected packages:
github.com/openfga/openfga @ 1.6.2 (+5 more)