AnythingLLM — Vulnerability (CVE-2026-42456)
Date: 2026-05
Affected: mintplexlabs/anythingllm
Attack vector: other
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2026-42456
CWE: CWE-200
CWE-639
CVSS: 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)

AnythingLLM is an application that turns pieces of content into context that any LLM can use as references during chatting. Prior to version 1.12.1, GET /api/workspace/:slug/tts/:chatId in AnythingLLM returns the text-to-speech audio for another user's chat response within the same workspace because the route validates workspace membership but does not enforce ownership of the targeted chat row. As a result, an authenticated user can access another user's private assistant response in audio form if the chatId is known or guessed. This constitutes an insecure direct object reference (IDOR) affecting private chat response content exposed through the TTS endpoint. This issue has been patched in version 1.12.1.


Mitigations:

Architectural layers (MAESTRO):