CriticalVulnerabilityLLM-specific
CVE-2026-65700: h2oGPT path traversal in OpenAI-compatible files API via bearer token
- Source
- NVD(opens in a new tab)
- Identifier
- CVE-2026-65700
- Published
- Record updated
- Known exploitation
- Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
- EPSS
- 1.5%
Summary
CVE-2026-65700 affects h2oGPT through 0.2.1 in its OpenAI-compatible files API. Unauthenticated remote attackers can supply traversal sequences in the bearer token, which the get_user_dir function in openai_server/backend_utils.py uses unsanitized via os.path.join, reaching the file content, delete and upload endpoints. Because the default API key is EMPTY, authentication is bypassed, letting attackers read, write and delete arbitrary server-accessible files, including writing startup hooks or application-loaded files to achieve remote code execution.
Mitigation
The source does not state a fix yet. Check the original advisory for updates.
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