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

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

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 May 2026
- **Updated:** 11 May 2026
- **Also known as:** GHSA-jwqg-jfg3-x5vv

## 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 (Authorization Bypass Through User-Controlled Key), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2026-42456?

It affects 1 product.


Products: 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.

## Other vulnerabilities in Mintplexlabs Anythingllm

- [CVE-2024-3025](https://insights.sbomify.com/CVE-2024-3025/): Path Traversal in mintplex-labs/anything-llm (critical 9.9)
- [CVE-2024-0455](https://insights.sbomify.com/CVE-2024-0455/): SSRF on AWS deployed instances of AnythingLLM via /metadata (critical 9.9)
- [CVE-2026-32626](https://insights.sbomify.com/CVE-2026-32626/): AnythingLLM has a Streaming Phase XSS to RCE via LLM Response Injection (critical 9.7)
- [CVE-2024-3104](https://insights.sbomify.com/CVE-2024-3104/): Remote Code Execution in mintplex-labs/anything-llm (critical 9.6)
- [CVE-2024-3149](https://insights.sbomify.com/CVE-2024-3149/): SSRF in mintplex-labs/anything-llm (critical 9.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-42456 and fix it if it is affected.

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

Affected product: Mintplexlabs Anythingllm. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-42456/ (Markdown: https://insights.sbomify.com/CVE-2026-42456/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-42456
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-42456
- OSV: https://osv.dev/vulnerability/CVE-2026-42456

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-42456/
Summaries are generated and may contain mistakes; the official description above is the record.