CVE-2026-88001
Low
No strong exploitation signal.
CVSS base
5.0
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
EPSS — probability of exploitation (30 days)
0.3%
20.0th percentile
CISA KEV
Not listed
Weakness / dates
CWE-918
Published 2026-09-09 · modified 2026-09-14
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | C | Changed |
| Confidentiality | L | Low |
| Integrity | N | None |
| Availability | N | None |
Timeline
- 2026-09-09 — Published (NVD)
- 2026-09-14 — Last modified (NVD)
Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 until 0.11.1, server-side web fetches did not reapply WEB_FETCH_FILTER_LIST or private-address controls to HTTP redirect destinations when AIOHTTP_CLIENT_ALLOW_REDIRECTS was enabled. An authenticated user could redirect the aiohttp and requests fetch paths to excluded hosts, loopback, private networks, or cloud metadata services and route resulting content into web search, URL ingestion, page-fetch tools, or chat image processing. This issue is fixed in version 0.11.1.
Affected
References
- https://github.com/open-webui/open-webui/commit/e3e4bd87df6fc629e7e22081d980d55a7632b8b7
- https://github.com/open-webui/open-webui/pull/27823
- https://github.com/open-webui/open-webui/releases/tag/v0.11.1
- exploit https://github.com/open-webui/open-webui/security/advisories/GHSA-5x7x-4c3c-qf5w
- exploit https://github.com/open-webui/open-webui/security/advisories/GHSA-5x7x-4c3c-qf5w