CVE-2026-37981

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. A broken access control vulnerability in the Account Resources user lookup endpoint allows a remote authenticated user, who owns at least one User-Managed Access (UMA) resource, to enumerate and harvest personally identifiable information (PII) for all realm users. By sending crafted requests with arbitrary usernames or email values, the endpoint returns full profile objects for unrelated users. This leads to broad profile-level information disclosure.

CVSS v3
4.3
EG Score
4.3(medium)
EPSS
29.1%
KEV
Not listed

Published

May 19, 2026

Last Modified

June 3, 2026

Advisory Details (4)

Auto-updated Jun 26, 2026
Patch available. Sources: redhat.
redhat

2455326 – (CVE-2026-37981) CVE-2026-37981 keycloak: org.keycloak.authorization: Keycloak: Information disclosure via broken access control in user lookup endpoint

https://bugzilla.redhat.com/show_bug.cgi?id=2455326
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-37981
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:19597
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:19596

Vendor Advisories for CVE-2026-37981(3)

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:26.4-172026-05-20redhat
redhatrhbk/keycloak-rhel92026-05-20redhat

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 8× in last 7d / 65× 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 140 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-37981?
CVE-2026-37981 is a medium vulnerability published on May 19, 2026. A flaw was found in Keycloak. A broken access control vulnerability in the Account Resources user lookup endpoint allows a remote authenticated user, who owns at least one User-Managed Access (UMA) resource, to enumerate and harvest personally identifiable information (PII) for all realm users. By…
When was CVE-2026-37981 disclosed?
CVE-2026-37981 was first published in the National Vulnerability Database on May 19, 2026, with the most recent update on June 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-37981 actively exploited?
CVE-2026-37981 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-37981?
CVE-2026-37981 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-37981?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-37981, 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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