Bug 2498841 (CVE-2026-55170)

Summary: CVE-2026-55170 github.com/openfga/openfga: OpenFGA: Incorrect authorization decisions due to case-insensitive comparisons in MySQL datastore
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: amctagga, aoconnor, bniver, flucifre, gmeno, gparvin, groman, lchilton, mbenjamin, mhackett, rhaigner, rhel-process-autobot, sfeifer, sostapov, vereddy, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in OpenFGA, an authorization/permission engine. When using MySQL as the datastore, and authorization decisions depend on case-sensitive user strings, the system may incorrectly treat case-distinct values (e.g., 'user:Alice' and 'user:alice') as equivalent. This can lead to improper policy enforcement, where two different authorization requests might receive the same, unintended response, potentially affecting access controls.
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Description OSIDB Bzimport 2026-07-09 22:03:32 UTC
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.