CVE-2026-9086

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM 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
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.3Exploit: None knownExposed: 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(medium)
EG Risk
33(Track)
EG Risk 33/100SSVC: 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
Severity73% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
54%
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 / 67× 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 340 total refreshes for this CVE.

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

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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 1% probability of exploitation in the next 30 days, which ranks it in the top 45.6% of all scored CVEs.
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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