CVE-2026-21836

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-05-20. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

The HCL DominoIQ RAG feature is affected by a Broken Access Control vulnerability.  Under certain circumstances, document level access restrictions will be ignored when determining what data to return from an AI query.  This could enable an authenticated attacker to view sensitive data.

CVSS v3
6.5
EG Score
6.5(medium)
EPSS
17.9%
KEV
Not listed

Published

May 20, 2026

Last Modified

May 20, 2026

Advisory Details (1)

Auto-updated Jun 14, 2026
No patch confirmed yet.
generic

Security Bulletin: HCL DominoIQ is affected by a Broken Access Control vulnerability (CVE-2026-21836) - Customer Support

https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0130932

Vendor Advisories for CVE-2026-21836(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 56× 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 129 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-21836?
CVE-2026-21836 is a medium vulnerability published on May 20, 2026. The HCL DominoIQ RAG feature is affected by a Broken Access Control vulnerability. Under certain circumstances, document level access restrictions will be ignored when determining what data to return from an AI query. This could enable an authenticated attacker to view sensitive data.
When was CVE-2026-21836 disclosed?
CVE-2026-21836 was first published in the National Vulnerability Database on May 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21836 actively exploited?
CVE-2026-21836 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-21836?
CVE-2026-21836 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-21836?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21836, 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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