Vulnerability in github.com/openfga/openfga (CVE-2026-61709)
Summary
Vulnerability in github.com/openfga/openfga (CVE-2026-61709). Confidential information can be exposed externally. Mitigation: upgrade to 1.18.1 or later.
Original description
The description as published by the source.
Description
In OpenFGA, the ListUsers API could incorrectly return a user who should have been excluded.
Preconditions
This applies if all of the following are present:
- The authorization model contains a relation defined as an intersection (and) where at least one operand is an exclusion of the form base but not excluded: e.g.
rel1: (public_user but not blocked) and rel2 - The base side of that exclusion is granted through a type-bound public wildcard (e.g. user:*).
- A user excluded by the but not clause is also granted, via a concrete tuple, through another operand of the intersection.
- Your application uses ListUsers to enumerate or enforce access
Fix
Upgrade to OpenFGA v1.18.1 or greater.
Acknowledgements
OpenFGA would like to thank @5ud0er for the detailed report.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-61709 has been found in github.com/openfga/openfga.
Confidential information can be exposed externally. CVSS score: 5.3/10.
What to do: upgrade github.com/openfga/openfga to 1.18.1 or later.
If unsure, ask your IT team or search "github.com/openfga/openfga CVE-2026-61709" on the vendor's site.
CVE-2026-61709 (github.com/openfga/openfga) — CWE-281 / CVSS v3 5.3
Attack vector: remote (network-reachable) / no user interaction
Patched: 1.18.1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-281) exists in github.com/openfga/openfga.
Check the vendor advisory for the affected versions of github.com/openfga/openfga.
Severity: Medium (CVSS 5.3/10). Confidential information can be exposed externally.
Update to 1.18.1.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'github.com/openfga/openfga' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'github.com/openfga/openfga' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
github.com/openfga/openfgaを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade github.com/openfga/openfga to 1.18.1ステージング環境で 1.18.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- web github.com
- web github.com
- web github.com
- web nvd.nist.gov
- web github.com