CVE-2026-1609

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-16. a secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.1Exploit: None knownExposed: 0

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

A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user account is disabled, Keycloak fails to validate the user’s disabled status during JWT authorization grant processing. A remote attacker with low privileges can exploit this improper access control vulnerability by presenting a valid assertion token from an external identity provider to obtain a JWT for a disabled user. This allows unauthorized access to sensitive resources.

CVSS v3
8.1
EG Score
8.1(high)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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 computed
Severity81% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
40%
KEV
Not listed

Published

July 16, 2026

Last Modified

July 16, 2026

Advisory Details (4)

Auto-updated Jul 16, 2026
Patch available. Sources: github_release, redhat.
github_release Patch Available

26.5.3

Patch available: keycloak/keycloak 26.5.3

https://github.com/keycloak/keycloak/releases/tag/26.5.3
generic

CVE-2026-1609 Disabled users can still obtain tokens via JWT Authorization Grant · Issue #46144 · keycloak/keycloak · GitHub

https://github.com/keycloak/keycloak/issues/46144
redhat

2435257 – (CVE-2026-1609) CVE-2026-1609 org.keycloak/keycloak-quarkus-server: Keycloak: Unauthorized Access via JWT authorization grant with disabled users

https://bugzilla.redhat.com/show_bug.cgi?id=2435257
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-1609

Vendor Advisories for CVE-2026-1609(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 40× 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. 2026-07-30 11:28 UTCEG score recompute
  2. 2026-07-30 11:28 UTCGHSA enrichment
  3. 2026-07-30 01:30 UTCEPSS rescore
  4. 2026-07-29 23:36 UTCGHSA enrichment
  5. 2026-07-29 11:44 UTCGHSA enrichment
  6. 2026-07-28 23:50 UTCEG score recompute
  7. 2026-07-28 23:50 UTCGHSA enrichment
  8. 2026-07-28 11:53 UTCGHSA enrichment
  9. 2026-07-27 23:46 UTCEG score recompute
  10. 2026-07-27 23:46 UTCGHSA enrichment
  11. 2026-07-27 14:13 UTCEPSS rescore
  12. 2026-07-27 11:14 UTCGHSA enrichment
  13. 2026-07-26 23:23 UTCEG score recompute
  14. 2026-07-26 23:23 UTCGHSA enrichment
  15. 2026-07-26 14:54 UTCEPSS rescore
  16. 2026-07-26 14:54 UTCEPSS rescore
  17. 2026-07-26 11:28 UTCEG score recompute
  18. 2026-07-26 11:28 UTCGHSA enrichment
  19. 2026-07-25 14:17 UTCEPSS rescore
  20. 2026-07-25 14:17 UTCEPSS rescore
  21. 2026-07-24 14:17 UTCEPSS rescore
  22. 2026-07-23 14:18 UTCEPSS rescore
  23. 2026-07-23 14:18 UTCEPSS rescore
  24. 2026-07-23 03:05 UTCEG score recompute
  25. 2026-07-22 14:08 UTCEPSS rescore
Show 15 more
  1. 2026-07-21 15:24 UTCEPSS rescore
  2. 2026-07-21 15:24 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. 2026-07-19 02:28 UTCEPSS rescore
  8. 2026-07-18 10:04 UTCEPSS rescore
  9. 2026-07-18 10:04 UTCEPSS rescore
  10. 2026-07-17 00:36 UTCGHSA enrichment
  11. 2026-07-16 17:03 UTCEPSS rescore
  12. 2026-07-16 17:03 UTCEPSS rescore
  13. 2026-07-16 12:45 UTCGHSA enrichment
  14. 2026-07-16 00:54 UTCEG score recompute
  15. 2026-07-16 00:53 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-1609?
CVE-2026-1609 is a high vulnerability published on July 16, 2026. A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user account is disabled, Keycloak fails to validate the user’s disabled status during JWT authorization grant processing. A remote attacker with low privileges can exploit this improper…
When was CVE-2026-1609 disclosed?
CVE-2026-1609 was first published in the National Vulnerability Database on July 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-1609 actively exploited?
CVE-2026-1609 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 59.6% of all scored CVEs.
What is the CVSS score of CVE-2026-1609?
CVE-2026-1609 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-1609?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-1609, 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

Explore the affected products and dependency analysis for CVE-2026-1609

Explore →

Is Your Infrastructure Affected by CVE-2026-1609?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs