PT-2026-41164 · Unknown · Open-Webui

Published 2026-05-14 · Updated 2026-05-16 · CVE-2026-45303

Positive Technologies (AI Summary)

CVSS v3.1

7.7

High

Base vector

AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions Open WebUI versions prior to 0.6.5

Description Scripts can be injected and executed through the HTML rendering view. The frontend includes a function to visualize HTML content of a chat by embedding it in an iFrame. However, the use of the sandbox directive with allow-scripts, allow-forms, and allow-same-origin permissions allows the content to execute scripts and access parent data, such as local storage, effectively nullifying the sandbox protections. This can lead to a Self-XSS attack or be leveraged against other users if an attacker tricks a user into entering specific input, uses the Chat Share function to clone a chat, embeds instructions in uploaded files, or imports conversations via settings.

Recommendations Update to version 0.6.5.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-45303

GHSA-4VRC-M9CH-6M3R

Affected Products

Open-Webui

References · 7

• 🔥 https://github.com/open-webui/open-webui/security/advisories/GHSA-4vrc-m9ch-6m3r · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-45303 · Security Note
• https://osv.dev/vulnerability/GHSA-4vrc-m9ch-6m3r · Vendor Advisory
• https://github.com/open-webui/open-webui · Note
• https://twitter.com/CVEnew/status/2055457497876422944 · Twitter Post
• https://t.me/CVEtracker/53975 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2055480084375412842 · Twitter Post