CVE-2026-59714 json
Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)
published 3mo ago modified last mo. also EUVD-2026-58246 , GHSA-x2ff-v5v8-m75m , PYSEC-2026-3605
- cvss
- 7.1
- 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 41%
- public exploits
- 0
- none known
Summary
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 before 0.10.0, any authenticated user can overwrite the content of a message in a channel they do not belong to (including private and DM channels) by sending a chat completion request with a channel:-prefixed chat_id and a target message_id. The channel: path routes pipeline output through _make_channel_emitter, which writes to the Messages table using the caller-supplied message_id without binding it to the channel. This issue is fixed in version 0.10.0.
Patch / fix
- pypi open-webui 0.10.0
- openwebui open_webui 0.10.0
Is CVE-2026-59714 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
- 2mo ago
Exploit prediction
0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
| GitHub | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
| OSV | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | open-webui | >=0.9.5, <0.10.0 |
0.10.0 |
Affected products
- open-webui open-webui
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
- github.com /open-webui/open-webui/pull/26385
-
github.com
/open-webui/open-webui/commit/ac3449cac91e62b08a7c28e54fcd044d14dea791
web
-
github.com
/open-webui/open-webui/commit/33e4e0dcc43afcca80f9c635d762cdc76c768ba9
web
-
github.com
/open-webui/open-webui/security/advisories/GHSA-x2ff-v5v8-m75m
web
-
github.com
/open-webui/open-webui/releases/tag/v0.10.0
web
-
github.com
/open-webui/open-webui
package
-
pypi.org
/project/open-webui
package
-
github.com
/advisories/GHSA-x2ff-v5v8-m75m
advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-59714
advisory
Sources
- CVE List CVE-2026-59714
- GitHub Advisory GHSA-x2ff-v5v8-m75m
- NVD CVE-2026-59714
- OSV PYSEC-2026-3605
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.