CVE-2026-82281

HIGHPre-NVD 7.47.4—
EchelonGraph scoreHIGH confidence

Score 7.4 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-28. a secondary CVSS source baseline 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
Trending — 4 sources updated this week
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: None knownExposed: 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
38(Track)
EG Risk 38/100SSVC: 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%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

August 28, 2026

Last Modified

August 28, 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 7× in last 7d / 7× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 20:37 UTCGHSA enrichment
  3. 2026-08-29 08:30 UTCEG score recompute
  4. 2026-08-29 08:30 UTCGHSA enrichment
  5. 2026-08-28 20:25 UTCEG score recompute
  6. 2026-08-28 19:40 UTCEG score recompute
  7. 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. 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 82.4% of all scored CVEs.
What is the CVSS score of CVE-2026-82281?
CVE-2026-82281 has a CVSS v3 base score of 7.4 (NVD).
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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-82281

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