Auth bypass in Mintplex-Labs Anything-Llm
CVE-2026-42456
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.
Vulnerability class: Information Disclosure
EPSS: 0.003 (22.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Mintplex-labs Anything-llm — versions < 1.12.1
- Mintplexlabs Anythingllm
Weakness classification (CWE)
References
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-42456?
- CVE-2026-42456 is a medium-severity vulnerability in Mintplex-Labs Anything-Llm, classified under Information Disclosure. CVSS score: 4.3/10. Published 2026-05-08.
- How severe is CVE-2026-42456?
- Medium severity. CVSS v3 base score is 4.3 out of 10.