CVE-2026-82281

HIGHPre-NVD 7.47.4—
EchelonGraph scoreHIGH confidence

Score 7.4 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-28. the CNA's CVSS baseline 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this weekElevated
7.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.4Exploit: Elevated riskExposed: 0

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

Kotaemon through 0.12.0 fails to properly validate conversation ownership in select_conv, delete_conv, rename_conv, and on_set_public_conversation functions in control.py. Attackers can read other users' chat histories, delete conversations, or rename conversations by supplying arbitrary conversation identifiers without proper authorization checks.

CVSS v3
7.4
EG Score
7.4(high)
EG Risk
49(Track*)
EG Risk 49/100SSVC: 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
Severity74% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

August 28, 2026

Last Modified

September 3, 2026

Advisory Details (4)

Auto-updated Aug 28, 2026
No patch confirmed yet.
generic

Kotaemon Missing Ownership Check in Conversation Functions | Advisories | VulnCheck

https://www.vulncheck.com/advisories/kotaemon-missing-ownership-check-in-conversation-functions
generic

kotaemon/libs/ktem/ktem/pages/chat/control.py at 9ad3e4e49aa35b8acddd235918a5d9753c1cfdf9 · Cinnamon/kotaemon · GitHub

https://github.com/Cinnamon/kotaemon/blob/9ad3e4e49aa35b8acddd235918a5d9753c1cfdf9/libs/ktem/ktem/pages/chat/control.py
generic

GitHub - Cinnamon/kotaemon: An open-source RAG-based tool for chatting with your documents. · GitHub

https://github.com/Cinnamon/kotaemon
generic

Cross-User Conversation IDOR -- Unauthenticated Read and Authenticated Delete of Any Conversation · Issue #846 · Cinnamon/kotaemon · GitHub

https://github.com/Cinnamon/kotaemon/issues/846

Vendor Advisories for CVE-2026-82281(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 27× in last 7d / 96× 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. 2026-09-21 02:46 UTCEG score recompute
  2. 2026-09-21 02:46 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 14:42 UTCGHSA enrichment
  5. 2026-09-20 02:36 UTCEG score recompute
  6. 2026-09-20 02:35 UTCGHSA enrichment
  7. 2026-09-19 14:32 UTCGHSA enrichment
  8. 2026-09-19 02:26 UTCEG score recompute
  9. 2026-09-19 02:25 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 14:23 UTCGHSA enrichment
  12. 2026-09-18 02:21 UTCEG score recompute
  13. 2026-09-18 02:21 UTCGHSA enrichment
  14. 2026-09-17 14:18 UTCGHSA enrichment
  15. 2026-09-17 02:08 UTCEG score recompute
  16. 2026-09-17 02:08 UTCGHSA enrichment
  17. 2026-09-16 14:08 UTCEPSS rescore
  18. 2026-09-16 14:05 UTCEG score recompute
  19. 2026-09-16 14:05 UTCGHSA enrichment
  20. 2026-09-16 05:15 UTCEPSS rescore
  21. 2026-09-16 01:21 UTCGHSA enrichment
  22. 2026-09-15 13:17 UTCEG score recompute
  23. 2026-09-15 13:17 UTCGHSA enrichment
  24. 2026-09-15 03:12 UTCEPSS rescore
  25. 2026-09-15 03:12 UTCEPSS rescore
Show 71 more
  1. 2026-09-15 01:14 UTCGHSA enrichment
  2. 2026-09-14 13:11 UTCGHSA enrichment
  3. 2026-09-14 01:08 UTCEG score recompute
  4. 2026-09-14 01:08 UTCGHSA enrichment
  5. 2026-09-13 13:06 UTCGHSA enrichment
  6. 2026-09-13 01:04 UTCEG score recompute
  7. 2026-09-13 01:04 UTCGHSA enrichment
  8. 2026-09-12 13:01 UTCGHSA enrichment
  9. 2026-09-12 00:58 UTCEG score recompute
  10. 2026-09-12 00:58 UTCGHSA enrichment
  11. 2026-09-11 14:53 UTCEPSS rescore
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 12:55 UTCEG score recompute
  14. 2026-09-11 12:54 UTCGHSA enrichment
  15. 2026-09-11 00:41 UTCGHSA enrichment
  16. 2026-09-10 12:38 UTCEG score recompute
  17. 2026-09-10 12:38 UTCGHSA enrichment
  18. 2026-09-10 00:35 UTCGHSA enrichment
  19. 2026-09-09 12:31 UTCGHSA enrichment
  20. 2026-09-09 00:28 UTCEG score recompute
  21. 2026-09-09 00:27 UTCGHSA enrichment
  22. 2026-09-08 22:01 UTCEPSS rescore
  23. 2026-09-08 03:05 UTCEG score recompute
  24. 2026-09-08 03:05 UTCGHSA enrichment
  25. 2026-09-07 15:02 UTCGHSA enrichment
  26. 2026-09-07 01:59 UTCGHSA enrichment
  27. 2026-09-06 13:56 UTCEG score recompute
  28. 2026-09-06 13:56 UTCGHSA enrichment
  29. 2026-09-06 13:48 UTCEPSS rescore
  30. 2026-09-06 01:53 UTCEG score recompute
  31. 2026-09-06 01:53 UTCGHSA enrichment
  32. 2026-09-05 15:31 UTCEPSS rescore
  33. 2026-09-05 13:50 UTCGHSA enrichment
  34. 2026-09-05 01:46 UTCEG score recompute
  35. 2026-09-05 01:46 UTCGHSA enrichment
  36. 2026-09-04 13:43 UTCEG score recompute
  37. 2026-09-04 13:43 UTCGHSA enrichment
  38. 2026-09-04 05:07 UTCEPSS rescore
  39. 2026-09-04 01:40 UTCGHSA enrichment
  40. 2026-09-03 13:36 UTCEG score recompute
  41. 2026-09-03 13:36 UTCGHSA enrichment
  42. 2026-09-03 08:44 UTCGHSA enrichment
  43. 2026-09-02 20:41 UTCEG score recompute
  44. 2026-09-02 20:41 UTCGHSA enrichment
  45. 2026-09-02 14:12 UTCEPSS rescore
  46. 2026-09-02 08:38 UTCGHSA enrichment
  47. 2026-09-01 20:35 UTCEG score recompute
  48. 2026-09-01 20:35 UTCGHSA enrichment
  49. 2026-09-01 13:54 UTCEPSS rescore
  50. 2026-09-01 08:33 UTCEG score recompute
  51. 2026-09-01 08:32 UTCGHSA enrichment
  52. 2026-09-01 04:40 UTCEPSS rescore
  53. 2026-09-01 04:40 UTCEPSS rescore
  54. 2026-08-31 20:23 UTCEG score recompute
  55. 2026-08-31 20:23 UTCGHSA enrichment
  56. 2026-08-31 19:31 UTCEG score recompute
  57. 2026-08-31 19:31 UTCGHSA enrichment
  58. 2026-08-31 08:48 UTCGHSA enrichment
  59. 2026-08-30 20:43 UTCEG score recompute
  60. 2026-08-30 20:42 UTCGHSA enrichment
  61. 2026-08-30 19:18 UTCEPSS rescore
  62. 2026-08-30 19:17 UTCEPSS rescore
  63. 2026-08-30 08:40 UTCEG score recompute
  64. 2026-08-30 08:40 UTCGHSA enrichment
  65. 2026-08-30 01:22 UTCEPSS rescore
  66. 2026-08-29 20:37 UTCGHSA enrichment
  67. 2026-08-29 08:30 UTCEG score recompute
  68. 2026-08-29 08:30 UTCGHSA enrichment
  69. 2026-08-28 20:25 UTCEG score recompute
  70. 2026-08-28 19:40 UTCEG score recompute
  71. 2026-08-28 19:36 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-82281?
CVE-2026-82281 is a high vulnerability published on August 28, 2026. Kotaemon through 0.12.0 fails to properly validate conversation ownership in selectconv, deleteconv, renameconv, and onsetpublicconversation functions in control.py. Attackers can read other users' chat histories, delete conversations, or rename conversations by supplying arbitrary conversation…
When was CVE-2026-82281 disclosed?
CVE-2026-82281 was first published in the National Vulnerability Database on August 28, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82281 actively exploited?
CVE-2026-82281 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 81.8% of all scored CVEs.
What is the CVSS score of CVE-2026-82281?
CVE-2026-82281 has a CVSS v4.0 base score of 7.4 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-82281?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82281, 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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