GHSA-4v28-j6q3-5m4r: open-webui (CVE-2026-87996)

Package	Ecosystem	Affected	Fixed in
open-webui	PyPI	>=0.9.6, <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 0.9.6 up to but not including 0.11.1 are vulnerable when the Playwright web loader is enabled (WEB_LOADER_ENGINE=playwright). An authenticated user who can submit URLs for ingestion or web search can use DNS rebinding to make the browser fetch internal addresses that the server's check was meant to block, such as cloud metadata or loopback-only services, and read the responses. Upgrade to Open WebUI 0.11.1, which fixes the issue with no configuration change needed. Deployments using the default web loader are not affected.

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
7.7	High	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0035, the 29th percentile, on 8 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.