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
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.3Exploit: None knownExposed services: Not assessed

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
4.3MEDIUMmedium confidence
EG Risk
20
EG Risk 20/100

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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.4%
EPSS %ILE
35th
KEV
Not listed

Published

May 19, 2026

Last Modified

July 23, 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 / EcosystemFix (by version range) / 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 rangeFix by version rangeDependents
org.keycloak:keycloak-services1.0-alpha-1 ... 9.0.3 (227 versions)
  • every version up to 26.6.3: fixed in 26.6.3
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 24× 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 192 total refreshes for this CVE.

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

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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 on May 19, 2026, with the most recent update on July 23, 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 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-8830?
CVE-2026-8830 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-8830?
A fix for CVE-2026-8830 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-8830 are linked in the Vendor Advisories panel on this page.

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