CVE-2026-70494 json
Open WebUI: A folder write-collaborator can permanently delete the owner's chats by deleting a shared subfolder
published 3mo ago modified last mo. also EUVD-2026-52926 , GHSA-3cg5-48j3-v4gv , PYSEC-2026-3638
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 46%
- public exploits
- 0
- none known
Summary
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.0, the DELETE /api/v1/folders/{id} handler in backend/open_webui/routers/folders.py allowed a user granted write access to a shared chat folder to permanently delete chats and messages belonging to the folder owner. The cascade following the authorization check is bound to the folder owner's id, but the subfolder check accepted any inherited write grant instead of requiring ownership or administrator status. A collaborator can destroy the owner's subtree or force-move chats out of it when delete_contents=false. This issue is fixed in 0.11.0.
Patch / fix
- pypi open-webui 0.11.0
- openwebui open_webui 0.11.0
Is CVE-2026-70494 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3mo ago
Exploit prediction
0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
| GitHub | 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 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | open-webui | >=0.10.0, <0.11.0 |
0.11.0 |
Affected products
- open-webui open-webui
Classification
References
-
github.com
/open-webui/open-webui/pull/27003
web, patch, vendor-advisory
-
github.com
/open-webui/open-webui/commit/915ef7d0798d3175819cedbb2f62d7bf0db78c98
web, patch
-
github.com
/open-webui/open-webui/security/advisories/GHSA-3cg5-48j3-v4gv
web, patch, vendor-advisory
-
github.com
/open-webui/open-webui/releases/tag/v0.11.0
web, release-notes
-
github.com
/open-webui/open-webui
package
-
pypi.org
/project/open-webui
package
-
github.com
/advisories/GHSA-3cg5-48j3-v4gv
advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-70494
advisory
Sources
- CVE List CVE-2026-70494
- GitHub Advisory GHSA-3cg5-48j3-v4gv
- NVD CVE-2026-70494
- OSV PYSEC-2026-3638
Fencer Intel 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.