CVE-2026-54019 json
Open WebUI: RAG ACL Bypass in Milvus Multitenancy Mode
published 2026-06-17 4 mo ago modified 2026-07-20 3 mo ago also GHSA-p5cp-r7rg-qpxc , PYSEC-2026-2750 , EUVD-2026-38524
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 32%
- public exploits
- 0
- none known
Summary
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, Open WebUI added collection-level ACL checks, but the patch can still be bypassed when Milvus multitenancy mode is enabled. The ACL allows unknown non-KB collection names as legacy/ephemeral collections. In Milvus multitenancy mode, that user-controlled collection name becomes a resource_id and is interpolated into a Milvus expression without escaping. This is caused by an incomplete fix for CVE-2026-44560 This vulnerability is fixed in 0.9.6.
Patch / fix
- pypi open-webui 0.9.6
- openwebui open_webui 0.9.6
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/open-webui/open-webui/security/advisories/GHSA-p5cp-r7rg-qpxc referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | open-webui | <0.9.6 |
0.9.6 |
Affected products
- open-webui open-webui
Classification
References
-
github.com
/open-webui/open-webui/security/advisories/GHSA-p5cp-r7rg-qpxc
exploit, web, mitigation, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-54019
advisory
-
github.com
/advisories/GHSA-p5cp-r7rg-qpxc
advisory
-
github.com
/open-webui/open-webui
package
-
github.com
/pypa/advisory-database/tree/main/vulns/open-webui/PYSEC-2026-2750.yaml
web
-
pypi.org
/project/open-webui
web, package
Sources
- CVE List CVE-2026-54019
- GitHub Advisory GHSA-p5cp-r7rg-qpxc
- NVD CVE-2026-54019
- OSV PYSEC-2026-2750
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.