CVE-2026-48096
Received Received - Intake
Iterator Cache Key Collision in OpenFGA Authorization Engine

Publication date: 2026-06-10

Last updated on: 2026-06-10

Assigner: GitHub, Inc.

Description
OpenFGA is an authorization/permission engine built for developers. Prior to version 1.16.0, when iterator caching is enabled, two distinct check requests can produce the same cache key, leading to OpenFGA reusing an earlier cached result for a subsequent request. This issue has been patched in version 1.16.0.
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Meta Information
Published
2026-06-10
Last Modified
2026-06-10
Generated
2026-06-10
AI Q&A
2026-06-10
EPSS Evaluated
N/A
NVD
CVE-2026-48096
EUVD
EUVD-2026-36061
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
openfga openfga to 1.16.0 (exc)
openfga openfga 1.16.0
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-668 The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.
CWE-345 The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.
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Executive Summary

This vulnerability exists in OpenFGA versions prior to 1.16.0 when iterator caching is enabled. Two different check requests can generate the same cache key, causing OpenFGA to reuse a cached result from an earlier request for a different subsequent request. This leads to incorrect authorization responses.

Impact Analysis

The vulnerability can cause OpenFGA to return incorrect authorization decisions by reusing cached results for different requests. This means a user might be granted or denied permissions incorrectly, potentially leading to unauthorized access or denial of legitimate access.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade OpenFGA to version 1.16.0 or later, where the issue with cache key collisions and incorrect cached results has been fixed.

This update also includes other important fixes and improvements, such as datastore ping timeout configurations and authentication token handling enhancements.

Compliance Impact

The provided information does not specify how the vulnerability in OpenFGA affects compliance with common standards and regulations such as GDPR or HIPAA.

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