CVE-2026-55170

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 84% 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, nvd
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, when MySQL is being used as the datastore and authorization decisions rely on case-sensitive user strings, the tuple, changelog, and authorization_model identifier columns can compare case-distinct values such as user:Alice and user:alice as equivalent, causing two distinct check requests to return the same response. This issue is fixed in 1.18.0.

CVSS v3
5.4
EG Score
5.4(medium)
EPSS
16.3%
KEV
Not listed

Published

June 18, 2026

Last Modified

July 14, 2026

Advisory Details (5)

Auto-updated Jul 14, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

OpenFGA Improper Policy Enforcement · Advisory · openfga/openfga · GitHub

https://github.com/openfga/openfga/security/advisories/GHSA-cf98-j28v-49v6
github_release Patch Available

v1.18.0

Patch available: openfga/openfga v1.18.0

https://github.com/openfga/openfga/releases/tag/v1.18.0
github_commit

commit a2e0dbefc3e0 (openfga/openfga)

Fix landed in openfga/openfga commit a2e0dbefc3e0 — awaiting tagged release

https://github.com/openfga/openfga/commit/a2e0dbefc3e01a95c785f81a3563bc6571b08b11
github_release Patch Available

openfga-0.3.9

Patch available: openfga/helm-charts openfga-0.3.9

https://github.com/openfga/helm-charts/releases/tag/openfga-0.3.9
github_commit Patch Available

commit 96d5517a2693 (openfga/helm-charts)

Patch available: openfga/helm-charts openfga-0.3.9 (contains commit 96d5517a2693)

https://github.com/openfga/helm-charts/commit/96d5517a2693ff5def451dee7d6b9d1baeb281f8

Vendor Advisories for CVE-2026-55170(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)
PackageVulnerable rangeFixed inDependents
github.com/openfga/openfga—1.18.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 22× 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.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:25 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:31 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 02:29 UTCEPSS rescore
  7. 2026-07-18 10:04 UTCEPSS rescore
  8. 2026-07-16 17:03 UTCEPSS rescore
  9. 2026-07-15 20:31 UTCEG score recompute▲ 3.30
  10. 2026-07-15 16:57 UTCEPSS rescore
  11. 2026-07-15 16:57 UTCEPSS rescore
  12. 2026-07-15 02:00 UTCEPSS rescore
  13. 2026-07-15 02:00 UTCEPSS rescore
  14. 2026-07-14 01:43 UTCNVD updateCVSS v3 → 5.4 · severity → MEDIUM
  15. 2026-07-13 22:31 UTCEPSS rescore
  16. 2026-07-13 06:13 UTCEPSS rescore
  17. 2026-07-13 06:13 UTCEPSS rescore
  18. 2026-07-12 05:46 UTCEPSS rescore
  19. 2026-07-11 08:27 UTCEPSS rescore
  20. 2026-07-11 08:27 UTCEPSS rescore
  21. 2026-07-09 21:42 UTCEG score recompute▲ 2.10
  22. 2026-07-09 21:40 UTCMITRE cvelistV5CVSS v3 → 2.1 · CVSS v4 → 2.1
  23. 2026-06-18 15:07 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-55170?
CVE-2026-55170 is a medium vulnerability published on June 18, 2026. OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, when MySQL is being used as the datastore and authorization decisions rely on case-sensitive user strings, the tuple, changelog, and authorization_model identifier columns can compare case-distinct values such as…
When was CVE-2026-55170 disclosed?
CVE-2026-55170 was first published in the National Vulnerability Database on June 18, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55170 actively exploited?
CVE-2026-55170 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-55170?
CVE-2026-55170 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-55170?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55170, 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

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