CVE-2026-54022 json
Open WebUI: Any authenticated user can read other users' private notes via Socket.IO
published 2026-06-17 4 mo ago modified 2026-07-20 3 mo ago also GHSA-8788-j68r-3cgh , PYSEC-2026-2712 , EUVD-2026-38521
- cvss
- 5.3
- 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 28%
- public exploits
- 0
- none known
Summary
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, the ydoc:document:join Socket.IO handler checks note ownership only when the document_id starts with note: (colon). However, the YdocManager storage layer normalizes all document IDs by replacing colons with underscores (document_id.replace(":", "_")). An attacker can join a document room using note_<id> (underscore) instead of note:<id> (colon), bypassing the authorization check entirely while accessing the same underlying Yjs document. The server then returns the full document state, leaking the victim's private note contents. This vulnerability is fixed in 0.8.11.
Patch / fix
- pypi open-webui 0.8.11
- openwebui open_webui 0.8.11
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/open-webui/open-webui/security/advisories/GHSA-8788-j68r-3cgh referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
| OSV | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | open-webui | <0.8.11 |
0.8.11 |
Affected products
- open-webui open-webui
Classification
References
-
github.com
/open-webui/open-webui/security/advisories/GHSA-8788-j68r-3cgh
exploit, web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-54022
advisory
-
github.com
/advisories/GHSA-8788-j68r-3cgh
advisory
-
github.com
/open-webui/open-webui
package
-
github.com
/pypa/advisory-database/tree/main/vulns/open-webui/PYSEC-2026-2712.yaml
web
-
pypi.org
/project/open-webui
web, package
Sources
- CVE List CVE-2026-54022
- GitHub Advisory GHSA-8788-j68r-3cgh
- NVD CVE-2026-54022
- OSV PYSEC-2026-2712
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.