CVE-2026-9086

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH confidence

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. a secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.3Exploit: NoneExposed: 0

A fix is available — apply it.

A flaw was found in Keycloak. A remote attacker with administrative privileges, specifically those with manage-client permission or access to client registration endpoints, could bypass client Uniform Resource Identifier (URI) validation. This is achieved by registering a malicious client with a specially crafted redirect URI using a case-insensitive javascript: or data: scheme. This Cross-Site Scripting (XSS) vulnerability allows for arbitrary code execution in the Keycloak origin when a victim clicks the crafted link, such as in the logout flow or the Admin Console.

CVSS v3
7.3
EG Score
7.3(high)
EPSS
34.3%
KEV
Not listed

Published

June 25, 2026

Last Modified

July 15, 2026

Advisory Details (2)

Auto-updated Jun 25, 2026
Patch available. Sources: redhat.
redhat

2480170 – (CVE-2026-9086) CVE-2026-9086 keycloak: Keycloak: Cross-site scripting (XSS) via case-insensitive URI validation bypass

https://bugzilla.redhat.com/show_bug.cgi?id=2480170
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-9086

Vendor Advisories for CVE-2026-9086(5)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhbk/keycloak-rhel9-operator:26.4-192026-06-25redhat
redhatrhbk/keycloak-rhel92026-06-25redhat
redhatrhbk/keycloak-rhel9-operator:26.6-82026-06-25redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 121× 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 121 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-9086?
CVE-2026-9086 is a high vulnerability published on June 25, 2026. A flaw was found in Keycloak. A remote attacker with administrative privileges, specifically those with manage-client permission or access to client registration endpoints, could bypass client Uniform Resource Identifier (URI) validation. This is achieved by registering a malicious client with a…
When was CVE-2026-9086 disclosed?
CVE-2026-9086 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9086 actively exploited?
CVE-2026-9086 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9086?
CVE-2026-9086 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-9086?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9086, 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.

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