CVSS 3.1
6.8 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:NCVE-2026-87015
Medium (6.8) in openwebui open webui. EPSS 0.5% chance of exploitation in the next 30 days. Fixed in open-webui 0.11.1.
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.27 until 0.11.1, backend/open_webui/utils/tools.py captured a cookie jar from the enclosing connection loop instead of binding it to each external tool callable. When multiple tool servers were attached and a session or system OAuth connection was processed last, a request to a different server configured for bearer authentication could include the calling user's Open WebUI session cookies, allowing that server's operator to reuse the session and take over the account. This issue is fixed in version 0.11.1.
Severity
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 41% of CVEs (scores of 2026-10-31)
- CWE
- CWE-201
- Published
- Modified
- Record from
- the NVD, synced
Affected
- openwebui:open_webui
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-p78m-89r6-pgf7 | PyPI | open-webui | >=0.6.27 <0.11.1 | 0.11.1 |
| PYSEC-2026-4124 | PyPI | open-webui | >=0.6.27 <0.11.1 | 0.11.1 |
References
- https://github.com/open-webui/open-webui/commit/cd9db21c5276807a2975ddba17cef369ad1114b7
- https://github.com/open-webui/open-webui/pull/28630
- https://github.com/open-webui/open-webui/releases/tag/v0.11.1
- https://github.com/open-webui/open-webui/security/advisories/GHSA-p78m-89r6-pgf7
- https://github.com/open-webui/open-webui/security/advisories/GHSA-p78m-89r6-pgf7