GHSA-p78m-89r6-pgf7: open-webui (CVE-2026-87015)

Package	Ecosystem	Affected	Fixed in
open-webui	PyPI	>=0.6.27, <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 0.6.27 up to but not including 0.11.1 can send a user's session cookies to an external tool server configured for bearer authentication when several tool servers are attached to the same request and one uses session or system OAuth authentication. An operator of such a bearer-configured server can receive a live session token and act as the affected user, including as an administrator if that user is one. Upgrade to Open WebUI 0.11.1 or later; no configuration change is needed.

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
6.8	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0048, the 41st percentile, on 15 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.