CVE-2026-54021
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, several direct, index-addressed Ollama proxy routes accept a caller-supplied url_idx path parameter and use it as a raw index into the admin-configured OLLAMA_BASE_URLS list. Access control on these routes validates only whether the user may use the requested model, never which backend the request is routed to. Any authenticated user can append an arbitrary url_idx to force their request onto an Ollama backend they were never authorized to reach, including internal, higher-privilege, or explicitly admin-disabled backends. This vulnerability is fixed in 0.9.6.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
open-webuiPyPI | < 0.9.6 | 0.9.6 |
Affected products
3cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*range: <0.9.6
- (no CPE)range: <= 0.9.5
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-9rpj-v7hf-vv2wghsaADVISORY
- github.com/open-webui/open-webui/security/advisories/GHSA-9rpj-v7hf-vv2wnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-54021ghsaADVISORY
- github.com/pypa/advisory-database/tree/main/vulns/open-webui/PYSEC-2026-2718.yamlghsaWEB
- pypi.org/project/open-webuighsaWEB
News mentions
1- Open WebUI: 16 CVEs Disclosed in Single-Day Batch, Many Bypassing Earlier PatchesVypr Intelligence · Jun 17, 2026