CVE WatchSep 24, 2026

CVE-2026-86867

Cinnamon's Kotaemon (all versions up to and including v0.12.0) multi-user chat interface contains multiple vulnerabilities due to incorrect

CVSS

6.5

Medium

EPSS

0.2%

KEV

—

Exploit Today

0-100

Published: Sep 23, 2026 · Last modified: Sep 24, 2026 · CWE-200 · CWE-639 · CWE-862

EPSS · 30d

0.1%EPSS · 30 days0.2%

2026-09-242026-10-19

Technical description

Cinnamon's Kotaemon (all versions up to and including v0.12.0) multi-user chat interface contains multiple vulnerabilities due to incorrect authorization and improper access controls. There are four handler methods in `libs/ktem/ktem/pages/chat/control.py` that load a Conversation record by its ID without comparing the requester's `user_id` to the conversation's owner `Conversation.user`. This allows any authenticated user to perform the following actions: 1. Read other user's chat transcripts, RAG retrieval history, AI-generated plots, and chat suggestions. 2. Permanently delete another user's conversation. 3. Rename another user's conversation. 4. Overwrite another user's conversation's chat suggestion list.

Official references

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2026-1128345.3 MED

—

———Missing Authorization vulnerability in Castos Seriously Simple Podcasting seriously-simple-podcasting allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Seriously Simple Podcasting: from n/a through 3.17.0.6h CVE-2026-9589—

—

———Missing authorization in the configuration cascade operations of the Collaboration Server in Unblu inc. Unblu Spark 7.0 through 8.36.1-hotfix.0, on on-premises and cloud deployments, allows an authenticated remote attacker to read and change configuration properties of entities they aren't authorized to access, including other users, other accounts and, in Unblu Cloud, other customers' accounts, via configuration read and write operations that target those entities. The Collaboration Server doesn't check whether the user reading or changing configuration has access to the entity the configuration belongs to. With certain non-default configuration validation settings, a registered user can additionally write configuration properties they aren't allowed to edit, in any scope. Exploitation requires an authenticated session but no user interaction.10h CVE-2026-1133535.4 MED

—

———LearnPress before 4.4.10 contains a missing authorization vulnerability in the admin_course_editor, admin_quiz_editor and admin_question_editor lp-ajax actions, allowing instructors to modify other instructors' content. Authenticated instructors can reuse their own generic editor nonce with another object's id parameter to alter courses, change quiz answers, and trash questions.6h CVE-2026-1133494.3 MED

—

———OpenCATS before 0.10.0 contains a missing authorization vulnerability in CalendarUI::onEditEvent() and onDeleteEvent() that allows authenticated users to modify or delete other users' calendar events. Attackers with EDIT or DELETE access can supply arbitrary eventID values to alter or remove any user's events, including non-public ones restricted to their owner.10h CVE-2026-1127874.3 MED

—

———OpenCATS before 0.10.0 contains a missing authorization vulnerability in ReportsUI::handleRequest() that allows authenticated users to view EEO demographic reports without the canSeeEEOInfo permission. Attackers can invoke the customizeEEOReport and generateEEOReportPreview actions to view aggregate ethnicity, veteran, gender and disability statistics.10h CVE-2026-1127865.4 MED

—

———OpenCATS before 0.10.0 contains a missing authorization vulnerability in ImportUI::handleRequest() that allows low-privileged authenticated users to roll back data imports. Attackers with READ-level access can request the import module's revert action with an importID to mass-delete imported candidate, company, and contact records.7h