Vulnerability Details CVE-2026-54033
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 10.1%
CVSS Severity
CVSS v3 Score 7.7
References
Products affected by CVE-2026-54033
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cpe:2.3:a:librechat:librechat:-
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cpe:2.3:a:librechat:librechat:0.0.1
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cpe:2.3:a:librechat:librechat:0.0.2
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cpe:2.3:a:librechat:librechat:0.0.3
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cpe:2.3:a:librechat:librechat:0.0.4
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cpe:2.3:a:librechat:librechat:0.0.5
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cpe:2.3:a:librechat:librechat:0.0.6
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cpe:2.3:a:librechat:librechat:0.1.0
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cpe:2.3:a:librechat:librechat:0.1.1
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cpe:2.3:a:librechat:librechat:0.2.0
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cpe:2.3:a:librechat:librechat:0.3.0
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cpe:2.3:a:librechat:librechat:0.3.3
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cpe:2.3:a:librechat:librechat:0.4.0
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cpe:2.3:a:librechat:librechat:0.4.1
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cpe:2.3:a:librechat:librechat:0.4.2
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cpe:2.3:a:librechat:librechat:0.4.3
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cpe:2.3:a:librechat:librechat:0.4.4
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cpe:2.3:a:librechat:librechat:0.4.5
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cpe:2.3:a:librechat:librechat:0.4.6
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cpe:2.3:a:librechat:librechat:0.4.7
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cpe:2.3:a:librechat:librechat:0.4.8
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cpe:2.3:a:librechat:librechat:0.5.0
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cpe:2.3:a:librechat:librechat:0.5.1
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cpe:2.3:a:librechat:librechat:0.5.2
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cpe:2.3:a:librechat:librechat:0.5.3
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cpe:2.3:a:librechat:librechat:0.5.4
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cpe:2.3:a:librechat:librechat:0.5.5
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cpe:2.3:a:librechat:librechat:0.5.6
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cpe:2.3:a:librechat:librechat:0.5.7
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cpe:2.3:a:librechat:librechat:0.5.8
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cpe:2.3:a:librechat:librechat:0.5.9
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cpe:2.3:a:librechat:librechat:0.6.0
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cpe:2.3:a:librechat:librechat:0.6.1
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cpe:2.3:a:librechat:librechat:0.6.10
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cpe:2.3:a:librechat:librechat:0.6.5
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cpe:2.3:a:librechat:librechat:0.6.6
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cpe:2.3:a:librechat:librechat:0.6.9
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cpe:2.3:a:librechat:librechat:0.7.0
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cpe:2.3:a:librechat:librechat:0.7.1
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cpe:2.3:a:librechat:librechat:0.7.2
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cpe:2.3:a:librechat:librechat:0.7.3
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cpe:2.3:a:librechat:librechat:0.7.4
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cpe:2.3:a:librechat:librechat:0.7.5
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cpe:2.3:a:librechat:librechat:0.7.6
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cpe:2.3:a:librechat:librechat:0.7.7
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cpe:2.3:a:librechat:librechat:0.7.8
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cpe:2.3:a:librechat:librechat:0.7.9
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cpe:2.3:a:librechat:librechat:0.8.0
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cpe:2.3:a:librechat:librechat:0.8.1
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cpe:2.3:a:librechat:librechat:0.8.2
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cpe:2.3:a:librechat:librechat:0.8.3