---
id: CVE-2026-48096
aliases:
  - GHSA-8396-jffm-qx4w
  - GO-2026-5239
title: >-
  OpenFGA has cache-key delimiter injection in shared-iterator and v2 iterator
  that caches enables intra-store authorization-decision poiso…
summary: >-
  OpenFGA has cache-key delimiter injection in shared-iterator and v2 iterator
  that caches enables intra-store authorization-decision poisoning
severity: medium
cvss: 5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L'
vendor: openfga
product: github.com/openfga/openfga
ecosystem: go
affected:
  - github.com/openfga/openfga < 1.16.0
patched:
  - github.com/openfga/openfga 1.16.0
published: '2026-06-11'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:51:08.128297117Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-8396-jffm-qx4w'
references:
  - url: 'https://github.com/openfga/openfga/security/advisories/GHSA-8396-jffm-qx4w'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-48096'
  - url: 'https://github.com/openfga/openfga'
  - url: 'https://github.com/openfga/openfga/releases/tag/v1.16.0'
  - url: 'https://github.com/advisories/GHSA-8396-jffm-qx4w'
tags:
  - osv
  - go
  - ghsa
epss: 0.00133
epssPercentile: 0.0228
cwe:
  - CWE-345
  - CWE-668
ingestedAt: '2026-07-07T15:41:59.291Z'
---

## Overview

### Description
In OpenFGA, 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.

### Preconditions
This applies if the following preconditions are present:

- FGA runs with SharedIteratorCache enabled,
- FGA runs with ListObjectsIteratorCache enabled.

### Fix
Upgrade to version 1.16.0 or greater.

### Acknowledgements
OpenFGA would like to thank @j4xT for the discovery and the detailed report.

## Affected packages

- `github.com/openfga/openfga < 1.16.0`

## Remediation

Upgrade to a patched release:

- `github.com/openfga/openfga 1.16.0`