CVE-2026-16108

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 88% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — Patch released this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in the default-groups REST endpoint and realm representation of Keycloak. This component is responsible for managing groups that are automatically assigned to new users within a realm. The issue allows a delegated administrator with realm-viewing permissions to see the names and identifiers of hidden default groups, even if they lack the specific permissions to view those groups. This can lead to the exposure of sensitive organizational structures or internal group names.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

July 17, 2026

Last Modified

September 16, 2026

Advisory Details (2)

Auto-updated Jul 17, 2026
Patch available. Sources: redhat.
redhat

2501740 – (CVE-2026-16108) CVE-2026-16108 keycloak-services: keycloak-services: Realm default-group reads disclose hidden groups under FGAP v2

https://bugzilla.redhat.com/show_bug.cgi?id=2501740
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-16108

Vendor Advisories for CVE-2026-16108(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhbk/keycloak-rhel9-operator:26.6-202026-09-16redhat
redhatrhbk-openshift-rhel9/rhbk-openshift-rhel92026-09-16redhat

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(2)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 17× in last 7d / 60× 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 153 total refreshes for this CVE.

  1. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-18 04:32 UTCEG score recompute
  3. 2026-09-18 04:32 UTCVendor advisory
  4. 2026-09-18 04:32 UTCGHSA enrichment
  5. 2026-09-16 19:21 UTCGHSA enrichment
  6. 2026-09-16 18:41 UTCGHSA enrichment
  7. 2026-09-16 17:11 UTCGHSA enrichment
  8. 2026-09-16 15:55 UTCEG score recompute
  9. 2026-09-16 15:55 UTCGHSA enrichment
  10. 2026-09-16 14:07 UTCEPSS rescore
  11. 2026-09-16 05:14 UTCEPSS rescore
  12. 2026-09-14 03:16 UTCEG score recompute
  13. 2026-09-14 03:16 UTCGHSA enrichment
  14. 2026-09-13 16:46 UTCEPSS rescore
  15. 2026-09-13 05:15 UTCEG score recompute
  16. 2026-09-13 05:15 UTCGHSA enrichment
  17. 2026-09-12 15:00 UTCEPSS rescore
  18. 2026-09-11 21:06 UTCEG score recompute
  19. 2026-09-11 21:06 UTCGHSA enrichment
  20. 2026-09-11 14:52 UTCEPSS rescore
  21. 2026-09-11 09:36 UTCEPSS rescore
  22. 2026-09-10 09:34 UTCEPSS rescore
  23. 2026-09-08 22:00 UTCEPSS rescore
  24. 2026-09-08 00:00 UTCEG score recompute
  25. 2026-09-08 00:00 UTCGHSA enrichment
Show 75 more
  1. 2026-09-07 16:01 UTCEPSS rescore
  2. 2026-09-06 18:53 UTCEG score recompute
  3. 2026-09-06 18:53 UTCGHSA enrichment
  4. 2026-09-06 13:47 UTCEPSS rescore
  5. 2026-09-05 20:26 UTCEG score recompute
  6. 2026-09-05 20:26 UTCGHSA enrichment
  7. 2026-09-04 05:06 UTCEPSS rescore
  8. 2026-09-02 14:11 UTCEPSS rescore
  9. 2026-09-01 13:53 UTCEPSS rescore
  10. 2026-09-01 04:39 UTCEPSS rescore
  11. 2026-08-31 15:39 UTCGHSA enrichment
  12. 2026-08-31 10:18 UTCGHSA enrichment
  13. 2026-08-31 01:19 UTCEG score recompute
  14. 2026-08-31 01:19 UTCGHSA enrichment
  15. 2026-08-30 19:17 UTCEPSS rescore
  16. 2026-08-30 03:17 UTCEG score recompute
  17. 2026-08-30 03:17 UTCGHSA enrichment
  18. 2026-08-30 01:22 UTCEPSS rescore
  19. 2026-08-28 21:41 UTCEPSS rescore
  20. 2026-08-27 12:13 UTCEG score recompute
  21. 2026-08-27 12:13 UTCGHSA enrichment
  22. 2026-08-26 14:46 UTCEPSS rescore
  23. 2026-08-26 11:55 UTCGHSA enrichment
  24. 2026-08-25 11:35 UTCEG score recompute
  25. 2026-08-25 11:35 UTCGHSA enrichment
  26. 2026-08-24 13:34 UTCEG score recompute
  27. 2026-08-24 13:34 UTCGHSA enrichment
  28. 2026-08-23 15:33 UTCGHSA enrichment
  29. 2026-08-22 17:32 UTCEG score recompute
  30. 2026-08-22 17:32 UTCGHSA enrichment
  31. 2026-08-21 23:49 UTCEPSS rescore
  32. 2026-08-21 19:30 UTCEG score recompute
  33. 2026-08-21 19:30 UTCGHSA enrichment
  34. 2026-08-20 22:55 UTCEPSS rescore
  35. 2026-08-20 21:29 UTCGHSA enrichment
  36. 2026-08-19 23:28 UTCEG score recompute
  37. 2026-08-19 23:28 UTCGHSA enrichment
  38. 2026-08-19 17:03 UTCEPSS rescore
  39. 2026-08-18 19:54 UTCEG score recompute
  40. 2026-08-18 19:54 UTCGHSA enrichment
  41. 2026-08-18 13:48 UTCEPSS rescore
  42. 2026-08-17 17:16 UTCEG score recompute
  43. 2026-08-17 17:15 UTCGHSA enrichment
  44. 2026-08-17 13:47 UTCEPSS rescore
  45. 2026-08-16 19:14 UTCEG score recompute
  46. 2026-08-16 19:14 UTCGHSA enrichment
  47. 2026-08-16 14:56 UTCEPSS rescore
  48. 2026-08-16 02:14 UTCEPSS rescore
  49. 2026-08-15 20:47 UTCEG score recompute
  50. 2026-08-15 20:47 UTCGHSA enrichment
  51. 2026-08-15 01:30 UTCEPSS rescore
  52. 2026-08-14 22:46 UTCGHSA enrichment
  53. 2026-08-14 00:45 UTCEG score recompute
  54. 2026-08-14 00:45 UTCGHSA enrichment
  55. 2026-08-13 22:00 UTCEPSS rescore
  56. 2026-08-13 02:43 UTCEG score recompute
  57. 2026-08-13 02:43 UTCGHSA enrichment
  58. 2026-08-12 13:50 UTCEPSS rescore
  59. 2026-08-12 04:42 UTCEG score recompute
  60. 2026-08-12 04:42 UTCGHSA enrichment
  61. 2026-08-11 13:42 UTCEPSS rescore
  62. 2026-08-11 06:41 UTCEG score recompute
  63. 2026-08-11 06:41 UTCGHSA enrichment
  64. 2026-08-11 00:00 UTCEPSS rescore
  65. 2026-08-10 08:40 UTCEG score recompute
  66. 2026-08-10 08:40 UTCGHSA enrichment
  67. 2026-08-09 13:46 UTCEPSS rescore
  68. 2026-08-09 10:39 UTCEG score recompute
  69. 2026-08-09 10:39 UTCGHSA enrichment
  70. 2026-08-08 16:37 UTCEPSS rescore
  71. 2026-08-08 12:37 UTCEG score recompute
  72. 2026-08-08 12:37 UTCGHSA enrichment
  73. 2026-08-07 14:35 UTCGHSA enrichment
  74. 2026-08-06 16:34 UTCEG score recompute▲ 2.20
  75. 2026-08-06 16:34 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-16108?
CVE-2026-16108 is a medium vulnerability published on July 17, 2026. A flaw was found in the default-groups REST endpoint and realm representation of Keycloak. This component is responsible for managing groups that are automatically assigned to new users within a realm. The issue allows a delegated administrator with realm-viewing permissions to see the names and…
When was CVE-2026-16108 disclosed?
CVE-2026-16108 was first published in the National Vulnerability Database on July 17, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16108 actively exploited?
CVE-2026-16108 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 88.1% of all scored CVEs.
What is the CVSS score of CVE-2026-16108?
CVE-2026-16108 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-16108?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16108, 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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