CVE-2026-82281 Cinnamon CVE debrief

Who should care

Defenders and administrators of Kotaemon installations should assess exposure and prioritize remediation due to the critical severity of this vulnerability. They should review and update Kotaemon to the latest version, implement proper authorization checks for conversation functions, and monitor chat histories and conversations for unauthorized access. Affected operators, platforms, and security teams should be aware of the potential impacts and take steps

Why it matters

CVE-2026-82281 is a critical vulnerability in Kotaemon that allows attackers to access unauthorized chat histories, delete or rename conversations, and requires proper authorization checks to prevent exploitation. Defenders and administrators of Kotaemon installations should assess exposure and prioritize remediation.

• Attackers can access unauthorized chat histories
• Conversations can be deleted or renamed without authorization
• Proper authorization checks are required to prevent exploitation
• Remediation priority is high due to critical severity

Technical summary

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. This allows attackers to read other users' chat histories, delete conversations, or rename conversations by supplying arbitrary conversation identifiers without proper authorization checks. The vulnerability has a critical severity score of 9.1 and requires proper authorization checks to prevent exploitation. Defenders and administrators of Kotaemon installations should assess exposure and prioritize remediation.

Defensive priority

High

Recommended defensive actions

• Review and update Kotaemon to the latest version if it's below 0.12.0
• Implement proper authorization checks for conversation functions
• Monitor chat histories and conversations for unauthorized access
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in Kotaemon through 0.12.0, where attackers can read other users' chat histories, delete conversations, or rename conversations by supplying arbitrary conversation identifiers without proper authorization checks in select_conv, delete_conv, rename_conv, and on_set_public_conversation functions in control.py.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.