Mintplex-Labs anything-llm up to 1.12.0 :chatId information disclosure

Summaryinfo

A vulnerability classified as problematic was found in Mintplex-Labs anything-llm up to 1.12.0. The affected element is an unknown function of the file /api/workspace/:slug/tts/:chatId. Such manipulation leads to information disclosure. This vulnerability is referenced as CVE-2026-42456. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Mintplex-Labs anything-llm up to 1.12.0 and classified as problematic. Affected by this issue is an unknown function of the file /api/workspace/:slug/tts/:chatId. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-42456 since 04/27/2026. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

Upgrading to version 1.12.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 4f3f77119d342e5489d1ba7533ad6d51bdcd565f is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Artificial Intelligence Software

Vendor

• Mintplex-Labs

Name

• anything-llm

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12.0

License

• open-source

Website

• Product: https://github.com/Mintplex-Labs/anything-llm/

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