CVE-2026-8830

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-05-19. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
4.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.3Exploit: NoneExposed: 0

A fix is available — apply it.

A flaw was found in Keycloak. An authenticated user can bypass configured WebAuthn policies during credential registration by manipulating client-side JavaScript. This occurs because the server-side processAction() fails to validate that the newly created credential's parameters, such as public key algorithms, match the realm's configured WebAuthn policies. This could lead to the creation of credentials that do not adhere to administrative security requirements, potentially weakening the overall security posture of the system by allowing non-compliant authentication methods.

CVSS v3
4.3
EG Score
4.3(medium)
EPSS
31.2%
KEV
Not listed

Published

May 19, 2026

Last Modified

June 26, 2026

Advisory Details (4)

Auto-updated Jun 15, 2026
Patch available. Sources: redhat.
redhat

2479565 – (CVE-2026-8830) CVE-2026-8830 keycloak: org.keycloak/keycloak-services: Keycloak: Policy bypass during WebAuthn credential registration via client-side JavaScript manipulation

https://bugzilla.redhat.com/show_bug.cgi?id=2479565
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-8830
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:25098
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:25097

Vendor Advisories for CVE-2026-8830(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-rhel9-operator2026-06-25redhat
redhatrhbk/keycloak-rhel9-operator:26.6-62026-06-10redhat

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.

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.keycloak:keycloak-services1.0-alpha-1 ... 9.0.3 (227 versions)26.6.3—

Weakness Classification(1)

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

Data Freshness Timeline

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

Frequently asked(5)

What is CVE-2026-8830?
CVE-2026-8830 is a medium vulnerability published on May 19, 2026. A flaw was found in Keycloak. An authenticated user can bypass configured WebAuthn policies during credential registration by manipulating client-side JavaScript. This occurs because the server-side processAction() fails to validate that the newly created credential's parameters, such as public key…
When was CVE-2026-8830 disclosed?
CVE-2026-8830 was first published in the National Vulnerability Database on May 19, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8830 actively exploited?
CVE-2026-8830 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 31.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8830?
CVE-2026-8830 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-8830?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8830, 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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