CVE-2026-109292

Medium

Description

Open WebUI from 0.6.27 before 0.11.4 contains an information disclosure vulnerability that allows destination servers to obtain user session cookies by receiving the full browser cookie jar on OAuth-mode connections. Operators of OpenAI-compatible connections, OpenAPI tool servers or terminal servers can capture forwarded session cookies from routine requests and replay them to hijack accounts, including administrators.

SeverityMedium

CVSS6.8

Exploit probability—

ProductOpen-webui

PublishedOct 12, 2026

First seenOct 12, 2026

Weakness typeCWE-200Sensitive information exposure

How to fix

Update

open-webui open-webui0.11.4 or later

Patches

Vendor advisories

github.com/open-webui/open-webui/security/advisories/GHSA-gqfh-jxvw-74rp

Affected products

Product	Affected versions	Fixed in
open-webui open-webui	0.6.27 ≤ v < 0.11.4	0.11.4

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