CVE-2026-54014

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, a path traversal vulnerability exists in open-webui's cache file serving endpoint that allows any authenticated user to read files from sibling directories outside the intended cache directory, by exploiting an incomplete startswith containment check that lacks a trailing path separator. The root cause is that serve_cache_file() in open_webui/main.py validates the resolved path with file_path.startswith(os.path.abspath(CACHE_DIR)) — without appending os.sep. This allows any path resolving to a sibling directory whose name begins with cache (e.g. cache_sibling, cache_backup, cached_models) to pass validation. This vulnerability is fixed in 0.9.6.

Severity (CVSS)

Weaknesses

• CWE-22 — CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected products

References

• https://github.com/open-webui/open-webui/security/advisories/GHSA-j2c8-v969-8r5c (x_refsource_CONFIRM)