CVE-2026-42456 AnythingLLM: Cross-User TTS Audio Disclosure via Chat ID (IDOR)

Medium 4.3 Published 8 May 2026 Updated 11 May 2026

Authenticated users can access other users' private text-to-speech audio responses via an IDOR vulnerability in the TTS endpoint.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-42456?

CVE-2026-42456 is a medium-severity vulnerability in Mintplexlabs Anythingllm, published on 8 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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.

Weakness: CWE-639, CWE-200

Which versions are affected by CVE-2026-42456?

It affects 1 product.

Products include Mintplexlabs Anythingllm.

How do I fix CVE-2026-42456?

No fix has been published for CVE-2026-42456 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-42456 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42456 exists.

All Mintplexlabs Anythingllm vulnerabilities

Sources

Also known as GHSA-jwqg-jfg3-x5vv.