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
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 7.3Exploit: None knownExposed services: Not assessed

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
7.3HIGHmedium confidence
EG Risk
33
EG Risk 33/100

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
Severity73% × 45%
Exploitation1% × 40%
Automatability0% × 15%
EPSS PROB
0.8%
EPSS %ILE
54th
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 / EcosystemFix (by version range) / 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 7× in last 7d / 41× 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 357 total refreshes for this CVE.

  1. 2026-10-04 23:23 UTCEPSS rescore
  2. 2026-10-03 14:26 UTCEPSS rescore
  3. 2026-10-02 17:57 UTCEPSS rescore
  4. 2026-10-01 19:51 UTCEPSS rescore
  5. 2026-09-30 15:04 UTCEPSS rescore
  6. 2026-09-28 13:52 UTCEPSS rescore
  7. 2026-09-28 13:52 UTCEPSS rescore
  8. 2026-09-27 13:49 UTCEPSS rescore
  9. 2026-09-26 15:59 UTCEPSS rescore
  10. 2026-09-24 14:04 UTCEPSS rescore
  11. 2026-09-23 17:54 UTCEPSS rescore
  12. 2026-09-23 08:44 UTCEG score recompute
  13. 2026-09-23 08:44 UTCVendor advisory
  14. 2026-09-23 08:44 UTCGHSA enrichment
  15. 2026-09-22 16:01 UTCEPSS rescore
  16. 2026-09-21 21:09 UTCEPSS rescore
  17. 2026-09-20 20:16 UTCEPSS rescore
  18. 2026-09-18 19:28 UTCEPSS rescore
  19. 2026-09-18 07:22 UTCEG score recompute
  20. 2026-09-18 07:22 UTCVendor advisory
  21. 2026-09-18 07:22 UTCGHSA enrichment
  22. 2026-09-17 19:32 UTCEPSS rescore
  23. 2026-09-16 14:09 UTCEPSS rescore
  24. 2026-09-16 05:15 UTCEPSS rescore
  25. 2026-09-15 03:12 UTCEPSS rescore
Show 75 more
  1. 2026-09-14 01:18 UTCEG score recompute
  2. 2026-09-14 01:18 UTCVendor advisory
  3. 2026-09-14 01:18 UTCGHSA enrichment
  4. 2026-09-13 16:48 UTCEPSS rescore
  5. 2026-09-13 09:38 UTCVendor advisory
  6. 2026-09-13 09:38 UTCGHSA enrichment
  7. 2026-09-12 15:46 UTCEG score recompute
  8. 2026-09-12 15:46 UTCVendor advisory
  9. 2026-09-12 15:46 UTCGHSA enrichment
  10. 2026-09-12 15:02 UTCEPSS rescore
  11. 2026-09-11 14:53 UTCEPSS rescore
  12. 2026-09-11 09:38 UTCEPSS rescore
  13. 2026-09-10 09:35 UTCEPSS rescore
  14. 2026-09-08 22:01 UTCEPSS rescore
  15. 2026-09-06 13:48 UTCEPSS rescore
  16. 2026-09-05 15:31 UTCEPSS rescore
  17. 2026-09-04 05:07 UTCEPSS rescore
  18. 2026-09-02 14:12 UTCEPSS rescore
  19. 2026-09-01 13:54 UTCEPSS rescore
  20. 2026-09-01 04:40 UTCEPSS rescore
  21. 2026-08-30 19:32 UTCEG score recompute
  22. 2026-08-30 19:32 UTCVendor advisory
  23. 2026-08-30 19:32 UTCGHSA enrichment
  24. 2026-08-30 19:18 UTCEPSS rescore
  25. 2026-08-30 01:22 UTCEPSS rescore
  26. 2026-08-28 21:42 UTCEPSS rescore
  27. 2026-08-27 23:20 UTCEG score recompute
  28. 2026-08-27 23:20 UTCVendor advisory
  29. 2026-08-27 23:20 UTCGHSA enrichment
  30. 2026-08-27 14:25 UTCEPSS rescore
  31. 2026-08-26 14:47 UTCEPSS rescore
  32. 2026-08-25 13:49 UTCEPSS rescore
  33. 2026-08-25 00:26 UTCEG score recompute
  34. 2026-08-25 00:26 UTCVendor advisory
  35. 2026-08-25 00:26 UTCGHSA enrichment
  36. 2026-08-24 14:18 UTCEPSS rescore
  37. 2026-08-24 13:09 UTCEG score recompute
  38. 2026-08-24 13:09 UTCVendor advisory
  39. 2026-08-24 13:09 UTCGHSA enrichment
  40. 2026-08-23 20:56 UTCVendor advisory
  41. 2026-08-23 20:56 UTCGHSA enrichment
  42. 2026-08-23 09:40 UTCEG score recompute
  43. 2026-08-23 09:40 UTCVendor advisory
  44. 2026-08-23 09:40 UTCGHSA enrichment
  45. 2026-08-23 00:19 UTCEPSS rescore
  46. 2026-08-22 22:24 UTCVendor advisory
  47. 2026-08-22 22:24 UTCGHSA enrichment
  48. 2026-08-22 10:26 UTCEG score recompute
  49. 2026-08-22 10:26 UTCVendor advisory
  50. 2026-08-22 10:26 UTCGHSA enrichment
  51. 2026-08-21 23:49 UTCEPSS rescore
  52. 2026-08-21 17:25 UTCVendor advisory
  53. 2026-08-21 17:25 UTCGHSA enrichment
  54. 2026-08-21 05:35 UTCEG score recompute
  55. 2026-08-21 05:35 UTCVendor advisory
  56. 2026-08-21 05:35 UTCGHSA enrichment
  57. 2026-08-20 22:56 UTCEPSS rescore
  58. 2026-08-20 18:19 UTCVendor advisory
  59. 2026-08-20 18:19 UTCGHSA enrichment
  60. 2026-08-20 07:03 UTCEG score recompute
  61. 2026-08-20 07:03 UTCVendor advisory
  62. 2026-08-20 07:03 UTCGHSA enrichment
  63. 2026-08-19 17:04 UTCEPSS rescore
  64. 2026-08-19 12:39 UTCVendor advisory
  65. 2026-08-19 12:39 UTCGHSA enrichment
  66. 2026-08-19 01:23 UTCEG score recompute
  67. 2026-08-19 01:23 UTCVendor advisory
  68. 2026-08-19 01:23 UTCGHSA enrichment
  69. 2026-08-18 13:49 UTCEPSS rescore
  70. 2026-08-17 13:47 UTCEPSS rescore
  71. 2026-08-17 13:35 UTCVendor advisory
  72. 2026-08-17 13:35 UTCGHSA enrichment
  73. 2026-08-17 02:19 UTCVendor advisory
  74. 2026-08-17 02:19 UTCGHSA enrichment
  75. 2026-08-16 15:03 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 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 0.8% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-9086?
CVE-2026-9086 has a CVSS base score of 7.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-9086?
A fix for CVE-2026-9086 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-9086 are linked in the Vendor Advisories panel on this page.

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