GHSA-wjwr-xfp9-r66p: open-webui (CVE-2026-87014)

Package	Ecosystem	Affected	Fixed in
open-webui	PyPI	>=0.9.0, <0.11.1	0.11.1

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Open WebUI versions 0.9.0 up to but not including 0.11.1 are affected. A user demoted from admin through SSO role sync (trusted-header role header or OAuth role mapping) keeps admin-level read and write access to all users' notes over any Socket.IO connection already open at the time of demotion. Exploitation requires a role-sync SSO mode to be enabled and the account to keep its connection open across the demotion. Upgrade to 0.11.1, which closes the gap without requiring configuration changes.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.5	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0051, the 44th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:09 UTC First seen by agentprime
31 Oct 2026, 14:09 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.