CVE-2026-29070 json
Open WebUI has unauthorized deletion of knowledge files
published 2026-03-26 7 mo ago modified 2026-07-13 3 mo ago also EUVD-2026-16484 , GHSA-26gm-93rw-cchf , PYSEC-2026-2693
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.6, an access control check is missing when deleting a file from a knowledge base. The only check being done is that the user has write access to the knowledge base (or is admin), but NOT that the file actually belongs to this knowledge base. It is thus possible to delete arbitrary files from arbitrary knowledge bases (as long as one knows the file id). Version 0.8.6 patches the issue.
Patch / fix
- pypi open-webui 0.8.6
- openwebui open_webui 0.8.6
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/open-webui/open-webui/security/advisories/GHSA-26gm-93rw-cchf referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
| GitHub | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
| NVD | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
| OSV | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | open-webui | <0.8.6 |
0.8.6 |
Affected products
- open-webui open-webui
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/open-webui/open-webui/security/advisories/GHSA-26gm-93rw-cchf
web, exploit, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-29070
advisory
-
github.com
/open-webui/open-webui
package
-
github.com
/open-webui/open-webui/blob/main/backend/open_webui/routers/knowledge.py#L803
web
-
pypi.org
/project/open-webui
package
-
github.com
/advisories/GHSA-26gm-93rw-cchf
advisory
Sources
- CVE List CVE-2026-29070
- GitHub Advisory GHSA-26gm-93rw-cchf
- NVD CVE-2026-29070
- OSV PYSEC-2026-2693
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.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.