Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Open WebUI versions before 0.9.6 are vulnerable to a bypass of the earlier RAG access control fix when Milvus multitenancy mode is enabled. An authenticated non-admin user can craft a collection name that is treated as an unknown legacy collection, which passes the ACL and injects into a Milvus filter expression, allowing them to read private knowledge-base chunks belonging to other users. Upgrade to Open WebUI 0.9.6 or later. The source gives few details on the exact trigger, and it applies only to deployments using Milvus multitenancy.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.5 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0039, the 33rd percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:42 UTC First seen by agentprime
- 31 Oct 2026, 14:42 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-p5cp-r7rg-qpxc
- OSV: GHSA-p5cp-r7rg-qpxc
- github.com/open-webui/open-webui/security/advisories/GHSA-p5cp-r7rg-qpxc
- nvd.nist.gov/vuln/detail/CVE-2026-54019
- github.com/advisories/GHSA-p5cp-r7rg-qpxc
- github.com/open-webui/open-webui
- github.com/pypa/advisory-database/tree/main/vulns/open-webui/PYSEC-2026-2750.yaml
- pypi.org/project/open-webui