CVE-2026-48096: Github.com/openfga/openfga OpenFGA Has Cache-key Delimiter Injection Vulnerability

MODERATE
Advisory Identifier: GHSA-8396-jffm-qx4w
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CVSS 5.0
CWE-668 CWE-345
Published
Advisory Summary

CVE-2026-48096 is a MODERATE (CVSS 5.0) openfga has cache-key delimiter injection vulnerability (CWE-668: Exposure of Resource to Wrong Sphere) affecting Github.com/openfga/openfga libraries in the Go ecosystem. The issue involves openfga has cache-key delimiter injection in shared-iterator and v2 iterator that caches enables intra-store authorization-decision poisoning. Remediation is available by upgrading affected packages to version 1.16.0.

CVE-2026-48096 at a Glance

CVE Identifier CVE-2026-48096
GHSA Identifier GHSA-8396-jffm-qx4w
Severity MODERATE
CVSS v3.1 Base Score 5.0
CWE Classification CWE-668: Exposure of Resource to Wrong Sphere
Affected Product Github.com/openfga/openfga
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 5.0

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-48096

To remediate this vulnerability, upgrade all affected Github.com/openfga/openfga dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/openfga/openfga fixed: 1.16.0 
Upgrade github.com/openfga/openfga to 1.16.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/openfga/openfga

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-48096, inspect your project dependencies for Github.com/openfga/openfga:

inspect dependencies for github.com/openfga/openfga

Analyze the terminal output to locate any version of Github.com/openfga/openfga in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.16.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-668: Exposure of Resource to Wrong Sphere, where the product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource. In Github.com/openfga/openfga, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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.

CVE-2026-48096 Affected Github.com/openfga/openfga Versions

1 component(s)
Fixed Versions:
1.16.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/openfga/openfga
golang/github.com/openfga/openfga
Go
< 1.16.0
1.16.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/openfga/openfga/security/advisories/GHSA-8396-jffm-qx4w
NVD — CVE-2026-48096 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-48096
Github.com/openfga/openfga Source Repository REPOSITORY
https://github.com/openfga/openfga
Github.com/openfga/openfga Release RELEASE
https://github.com/openfga/openfga/releases/tag/v1.16.0

Frequently Asked Questions

What is CVE-2026-48096?
CVE-2026-48096 is a security vulnerability in Github.com/openfga/openfga involving OpenFGA has cache-key delimiter injection in shared-iterator and v2 iterator that caches enables intra-store authorization-decision poisoning under CWE-668: Exposure of Resource to Wrong Sphere.
Which Github.com/openfga/openfga versions are affected?
Affected versions include releases prior to 1.16.0 across affected packages: github.com/openfga/openfga.
What version fixes CVE-2026-48096?
Upgrading to 1.16.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/openfga/openfga affected?
Yes, github.com/openfga/openfga is affected in releases prior to 1.16.0. Upgrade your dependency to 1.16.0 or later.
What is the CVSS score of CVE-2026-48096?
CVE-2026-48096 has a CVSS v3.1 base score of 5.0 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2026-48096?
CVE-2026-48096 is classified under CWE-668: Exposure of Resource to Wrong Sphere (The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.).
How can I check Go dependencies for CVE-2026-48096?
Run the dependency tree command: 'inspect dependencies for github.com/openfga/openfga'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-8396-jffm-qx4w",
  "modified" : "2026-07-21T13:54:43Z",
  "published" : "2026-06-11T20:28:18Z",
  "aliases" : [ "CVE-2026-48096" ],
  "summary" : "OpenFGA has cache-key delimiter injection in shared-iterator and v2 iterator that caches enables intra-store authorization-decision poisoning",
  "details" : "### Description\nIn 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.\n\n### Preconditions\nThis applies if the following preconditions are present:\n\n- FGA runs with SharedIteratorCache enabled,\n- FGA runs with ListObjectsIteratorCache enabled.\n\n### Fix\nUpgrade to version 1.16.0 or greater.\n\n### Acknowledgements\nOpenFGA would like to thank @j4xT for the discovery and the detailed report.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/openfga/openfga"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.16.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openfga/openfga/security/advisories/GHSA-8396-jffm-qx4w"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-48096"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openfga/openfga"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openfga/openfga/releases/tag/v1.16.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-345", "CWE-668" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-11T20:28:18Z",
    "nvd_published_at" : "2026-06-10T16:17:09Z"
  }
}