CVE-2026-1609

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

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

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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: 0.6%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100

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%
EPSS PROB
0.6%
EPSS %ILE
44th
KEV
Not listed

Published

July 16, 2026

Last Modified

August 10, 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 10× in last 7d / 42× 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.

Showing the most recent 100 of 201 total refreshes for this CVE.

  1. 2026-09-29 15:21 UTCEPSS rescore
  2. 2026-09-28 13:51 UTCEPSS rescore
  3. 2026-09-28 08:39 UTCEG score recompute
  4. 2026-09-28 08:39 UTCGHSA enrichment
  5. 2026-09-27 13:47 UTCEPSS rescore
  6. 2026-09-26 15:58 UTCEPSS rescore
  7. 2026-09-24 08:43 UTCEG score recompute
  8. 2026-09-24 08:43 UTCGHSA enrichment
  9. 2026-09-23 03:10 UTCEG score recompute
  10. 2026-09-23 03:10 UTCGHSA enrichment
  11. 2026-09-18 19:27 UTCEPSS rescore
  12. 2026-09-18 04:41 UTCEG score recompute
  13. 2026-09-18 04:41 UTCGHSA enrichment
  14. 2026-09-16 14:07 UTCEPSS rescore
  15. 2026-09-16 05:14 UTCEPSS rescore
  16. 2026-09-14 11:02 UTCGHSA enrichment
  17. 2026-09-13 23:10 UTCEG score recompute
  18. 2026-09-13 23:10 UTCGHSA enrichment
  19. 2026-09-13 16:46 UTCEPSS rescore
  20. 2026-09-13 07:10 UTCEG score recompute
  21. 2026-09-13 07:10 UTCGHSA enrichment
  22. 2026-09-12 15:00 UTCEPSS rescore
  23. 2026-09-12 12:54 UTCGHSA enrichment
  24. 2026-09-11 21:43 UTCEG score recompute
  25. 2026-09-11 21:43 UTCGHSA enrichment
Show 75 more
  1. 2026-09-11 14:52 UTCEPSS rescore
  2. 2026-09-11 09:36 UTCEPSS rescore
  3. 2026-09-10 09:34 UTCEPSS rescore
  4. 2026-09-08 22:00 UTCEPSS rescore
  5. 2026-09-08 00:39 UTCEG score recompute
  6. 2026-09-08 00:39 UTCGHSA enrichment
  7. 2026-09-07 16:01 UTCEPSS rescore
  8. 2026-09-06 13:47 UTCEPSS rescore
  9. 2026-09-06 13:27 UTCGHSA enrichment
  10. 2026-09-05 20:44 UTCEG score recompute
  11. 2026-09-05 20:44 UTCGHSA enrichment
  12. 2026-09-04 05:06 UTCEPSS rescore
  13. 2026-09-02 14:11 UTCEPSS rescore
  14. 2026-09-01 13:53 UTCEPSS rescore
  15. 2026-09-01 04:39 UTCEPSS rescore
  16. 2026-08-31 03:51 UTCEG score recompute
  17. 2026-08-31 03:51 UTCGHSA enrichment
  18. 2026-08-30 19:17 UTCEPSS rescore
  19. 2026-08-30 15:59 UTCGHSA enrichment
  20. 2026-08-30 03:41 UTCEG score recompute
  21. 2026-08-30 03:41 UTCGHSA enrichment
  22. 2026-08-30 01:22 UTCEPSS rescore
  23. 2026-08-28 21:41 UTCEPSS rescore
  24. 2026-08-28 01:51 UTCEG score recompute
  25. 2026-08-28 01:51 UTCGHSA enrichment
  26. 2026-08-27 14:25 UTCEPSS rescore
  27. 2026-08-27 12:35 UTCGHSA enrichment
  28. 2026-08-26 23:51 UTCEG score recompute
  29. 2026-08-26 23:51 UTCGHSA enrichment
  30. 2026-08-26 14:46 UTCEPSS rescore
  31. 2026-08-26 11:59 UTCGHSA enrichment
  32. 2026-08-25 23:53 UTCEG score recompute
  33. 2026-08-25 23:52 UTCGHSA enrichment
  34. 2026-08-25 13:48 UTCEPSS rescore
  35. 2026-08-25 11:32 UTCGHSA enrichment
  36. 2026-08-24 23:34 UTCEG score recompute
  37. 2026-08-24 23:34 UTCGHSA enrichment
  38. 2026-08-24 11:42 UTCEG score recompute
  39. 2026-08-24 11:42 UTCGHSA enrichment
  40. 2026-08-23 23:50 UTCGHSA enrichment
  41. 2026-08-23 11:59 UTCEG score recompute
  42. 2026-08-23 11:59 UTCGHSA enrichment
  43. 2026-08-23 00:19 UTCEPSS rescore
  44. 2026-08-23 00:07 UTCGHSA enrichment
  45. 2026-08-22 12:15 UTCGHSA enrichment
  46. 2026-08-21 23:51 UTCEG score recompute
  47. 2026-08-21 23:51 UTCGHSA enrichment
  48. 2026-08-21 23:49 UTCEPSS rescore
  49. 2026-08-21 11:59 UTCGHSA enrichment
  50. 2026-08-21 00:07 UTCEG score recompute
  51. 2026-08-21 00:07 UTCGHSA enrichment
  52. 2026-08-20 22:55 UTCEPSS rescore
  53. 2026-08-20 12:16 UTCGHSA enrichment
  54. 2026-08-20 00:05 UTCEG score recompute
  55. 2026-08-20 00:05 UTCGHSA enrichment
  56. 2026-08-19 17:03 UTCEPSS rescore
  57. 2026-08-19 10:16 UTCGHSA enrichment
  58. 2026-08-18 22:17 UTCEG score recompute
  59. 2026-08-18 22:17 UTCGHSA enrichment
  60. 2026-08-18 13:48 UTCEPSS rescore
  61. 2026-08-18 10:19 UTCGHSA enrichment
  62. 2026-08-17 22:27 UTCEG score recompute
  63. 2026-08-17 22:27 UTCGHSA enrichment
  64. 2026-08-17 13:47 UTCEPSS rescore
  65. 2026-08-17 10:35 UTCGHSA enrichment
  66. 2026-08-16 22:43 UTCEG score recompute
  67. 2026-08-16 22:43 UTCGHSA enrichment
  68. 2026-08-16 14:56 UTCEPSS rescore
  69. 2026-08-16 10:51 UTCEG score recompute
  70. 2026-08-16 10:51 UTCGHSA enrichment
  71. 2026-08-16 02:14 UTCEPSS rescore
  72. 2026-08-15 23:00 UTCGHSA enrichment
  73. 2026-08-15 11:08 UTCEG score recompute
  74. 2026-08-15 11:08 UTCGHSA enrichment
  75. 2026-08-15 01:30 UTCEPSS rescore

Related CVEs(same CWE)

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 on July 16, 2026, with the most recent update on August 10, 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 0.6% probability of exploitation in the next 30 days (44th percentile of EPSS-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?
A fix for CVE-2026-1609 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-1609 are linked in the Vendor Advisories panel on this page.

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