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 — 4 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
33.8%
KEV
Not listed

Published

June 25, 2026

Last Modified

July 1, 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 53× in last 7d / 86× 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. 2026-07-07 00:30 UTCEG score recompute
  2. 2026-07-07 00:30 UTCVendor advisory
  3. 2026-07-07 00:30 UTCGHSA enrichment
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 13:14 UTCEG score recompute
  6. 2026-07-06 13:14 UTCVendor advisory
  7. 2026-07-06 13:13 UTCGHSA enrichment
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-06 01:46 UTCEG score recompute
  10. 2026-07-06 01:46 UTCVendor advisory
  11. 2026-07-06 01:46 UTCGHSA enrichment
  12. 2026-07-05 14:30 UTCEG score recompute
  13. 2026-07-05 14:30 UTCVendor advisory
  14. 2026-07-05 14:30 UTCGHSA enrichment
  15. 2026-07-05 03:14 UTCEG score recompute
  16. 2026-07-05 03:14 UTCVendor advisory
  17. 2026-07-05 03:14 UTCGHSA enrichment
  18. 2026-07-05 02:31 UTCEPSS rescore
  19. 2026-07-05 02:30 UTCEPSS rescore
  20. 2026-07-04 15:58 UTCEG score recompute
  21. 2026-07-04 15:58 UTCVendor advisory
  22. 2026-07-04 15:58 UTCGHSA enrichment
  23. 2026-07-04 06:31 UTCEPSS rescore
  24. 2026-07-04 06:31 UTCEPSS rescore
  25. 2026-07-04 04:41 UTCEG score recompute
Show 61 more
  1. 2026-07-04 04:41 UTCVendor advisory
  2. 2026-07-04 04:41 UTCGHSA enrichment
  3. 2026-07-03 17:23 UTCEG score recompute
  4. 2026-07-03 17:23 UTCVendor advisory
  5. 2026-07-03 17:23 UTCGHSA enrichment
  6. 2026-07-03 06:07 UTCEG score recompute
  7. 2026-07-03 06:07 UTCVendor advisory
  8. 2026-07-03 06:07 UTCGHSA enrichment
  9. 2026-07-02 18:51 UTCEG score recompute
  10. 2026-07-02 18:51 UTCVendor advisory
  11. 2026-07-02 18:50 UTCGHSA enrichment
  12. 2026-07-02 07:35 UTCEG score recompute
  13. 2026-07-02 07:35 UTCVendor advisory
  14. 2026-07-02 07:34 UTCGHSA enrichment
  15. 2026-07-01 20:17 UTCEG score recompute
  16. 2026-07-01 20:17 UTCVendor advisory
  17. 2026-07-01 20:17 UTCGHSA enrichment
  18. 2026-07-01 15:07 UTCEPSS rescore
  19. 2026-07-01 09:01 UTCEG score recompute
  20. 2026-07-01 09:01 UTCVendor advisory
  21. 2026-07-01 09:01 UTCGHSA enrichment
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-30 21:45 UTCEG score recompute
  24. 2026-06-30 21:45 UTCVendor advisory
  25. 2026-06-30 21:45 UTCGHSA enrichment
  26. 2026-06-30 10:29 UTCEG score recompute
  27. 2026-06-30 10:29 UTCVendor advisory
  28. 2026-06-30 10:29 UTCGHSA enrichment
  29. 2026-06-29 23:13 UTCEG score recompute
  30. 2026-06-29 23:13 UTCVendor advisory
  31. 2026-06-29 23:13 UTCGHSA enrichment
  32. 2026-06-29 14:06 UTCEPSS rescore
  33. 2026-06-29 11:58 UTCEG score recompute
  34. 2026-06-29 11:58 UTCVendor advisory
  35. 2026-06-29 11:58 UTCGHSA enrichment
  36. 2026-06-29 00:42 UTCEG score recompute
  37. 2026-06-29 00:42 UTCVendor advisory
  38. 2026-06-29 00:42 UTCGHSA enrichment
  39. 2026-06-28 14:07 UTCEPSS rescore
  40. 2026-06-28 13:26 UTCEG score recompute
  41. 2026-06-28 13:26 UTCVendor advisory
  42. 2026-06-28 13:26 UTCGHSA enrichment
  43. 2026-06-28 04:56 UTCEPSS rescore
  44. 2026-06-28 02:10 UTCEG score recompute
  45. 2026-06-28 02:10 UTCVendor advisory
  46. 2026-06-28 02:10 UTCGHSA enrichment
  47. 2026-06-27 14:54 UTCEG score recompute
  48. 2026-06-27 14:54 UTCVendor advisory
  49. 2026-06-27 14:54 UTCGHSA enrichment
  50. 2026-06-27 03:38 UTCEG score recompute
  51. 2026-06-27 03:38 UTCVendor advisory
  52. 2026-06-27 03:38 UTCGHSA enrichment
  53. 2026-06-27 03:08 UTCEPSS rescore
  54. 2026-06-26 16:22 UTCEG score recompute
  55. 2026-06-26 16:22 UTCVendor advisory
  56. 2026-06-26 16:22 UTCGHSA enrichment
  57. 2026-06-26 05:06 UTCEG score recompute
  58. 2026-06-26 05:06 UTCVendor advisory
  59. 2026-06-26 05:06 UTCGHSA enrichment
  60. 2026-06-25 17:51 UTCEG score recompute
  61. 2026-06-25 17:48 UTCNVD updatefirst tracked

Related CVEs(same vendor + same CWE)

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 1, 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 33.8% 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.

Dependency Blast Radius

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