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High severity7.7NVD Advisory· Published Jun 25, 2026· Updated Jun 29, 2026

CVE-2026-54033

CVE-2026-54033

Description

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, LibreChat allows users to configure custom OpenAI-compatible API endpoints by setting a baseURL. This URL is used to construct HTTP requests without any SSRF validation — no private IP check, no scheme restriction, no DNS pinning. An authenticated user can set baseURL to internal network addresses. This vulnerability is fixed in 0.8.4-rc1.

Affected products

2
  • Librechat/Librechat2 versions
    cpe:2.3:a:librechat:librechat:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:librechat:librechat:*:*:*:*:*:*:*:*range: <=0.8.3
    • (no CPE)range: <0.8.4-rc1

Patches

Vulnerability mechanics

References

1

News mentions

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