OpenFGA is an authorization and permission engine built for developers. Prior to 1.18.1, the ListUsers API could return a user that should have been excluded when an authorization relation used an intersection containing a base but not excluded operand, the base was granted through a type-bound public wildcard, and the excluded user also had a concrete tuple through another intersection operand. In pkg/server/commands/listusers/list_users_rpc.go, expandIntersection counted the concrete tuple and wildcard without first rejecting entries in excludedUsersMap. Applications that used ListUsers to enumerate or enforce access could therefore treat an excluded user as authorized. This issue is fixed in version 1.18.1.
CVE-2026-61709
MEDIUMPre-NVD 5.35.3—Trending — 3 sources updated this week
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 73% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.3
- EG Score
- 5.3(medium)
- EG Risk
- 24(Track)EG Risk 24/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity53% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 27%
- KEV
- Not listed
Published
September 16, 2026
Last Modified
September 18, 2026
Advisory Details (3)
Auto-updated Sep 16, 2026Patch available. Sources: github, github_commit, github_release.
github_release Patch Available
v1.18.1
Patch available: openfga/openfga v1.18.1
https://github.com/openfga/openfga/releases/tag/v1.18.1github_commit
commit 171806c93b86 (openfga/openfga)
Fix landed in openfga/openfga commit 171806c93b86 — awaiting tagged release
https://github.com/openfga/openfga/commit/171806c93b86bca29e0212ceb8b6ee9c48eb9ac3github Patch Available
OpenFGA Improper Policy Enforcement · Advisory · openfga/openfga · GitHub
https://github.com/openfga/openfga/security/advisories/GHSA-g3pg-frfm-pr2mVendor Advisories for CVE-2026-61709(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
Go(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| github.com/openfga/openfga | — | 1.18.1 | — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 6× in last 7d / 6× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-18 19:28 UTCEPSS rescore
- 2026-09-18 18:32 UTCEG score recompute
- 2026-09-18 18:08 UTCEG score recompute
- 2026-09-16 15:20 UTCEG score recompute
- 2026-09-16 14:26 UTCEG score recompute
- 2026-09-16 14:25 UTCMITRE cvelistV5first tracked
Frequently asked(5)
What is CVE-2026-61709?
CVE-2026-61709 is a medium vulnerability published on September 16, 2026. OpenFGA is an authorization and permission engine built for developers. Prior to 1.18.1, the ListUsers API could return a user that should have been excluded when an authorization relation used an intersection containing a base but not excluded operand, the base was granted through a type-bound…
When was CVE-2026-61709 disclosed?
CVE-2026-61709 was first published in the National Vulnerability Database on September 16, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-61709 actively exploited?
CVE-2026-61709 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 72.9% of all scored CVEs.
What is the CVSS score of CVE-2026-61709?
CVE-2026-61709 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-61709?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-61709, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-61709
Is Your Infrastructure Affected by CVE-2026-61709?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.