CVE-2026-45301 json
Open WebUI: Missing permission check in files API allows authenticated users to list, access and delete every uploaded file
published 5mo ago modified 3mo ago also EUVD-2026-30653 , GHSA-r8wh-8m7r-fh33 , PYSEC-2026-2753
- cvss
- 8.1
- 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 19%
- public exploits
- 0
- none known
Summary
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.3.16, a missing permission check in all files related API endpoints allows any authenticated user to list, access and delete every file uploaded by every user to the platform. This vulnerability is fixed in 0.3.16.
Patch / fix
- pypi open-webui 0.3.16
- openwebui open_webui 0.3.16
Is CVE-2026-45301 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
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 5mo ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/open-webui/open-webui/security/advisories/GHSA-r8wh-8m7r-fh33 referenced PoC, tagged "exploit" by a source, unverified
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:H/I:H/A:N |
| GitHub | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| OSV | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | open-webui | <0.3.16 |
0.3.16 |
Affected products
- open-webui open-webui
Classification
- Weakness
-
- CWE-284 Improper Access Control
References
-
github.com
/open-webui/open-webui/security/advisories/GHSA-r8wh-8m7r-fh33
exploit, web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-45301
advisory
-
github.com
/open-webui/open-webui
package
-
pypi.org
/project/open-webui
package
-
github.com
/advisories/GHSA-r8wh-8m7r-fh33
advisory
Sources
- CVE List CVE-2026-45301
- GitHub Advisory GHSA-r8wh-8m7r-fh33
- NVD CVE-2026-45301
- OSV PYSEC-2026-2753
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.