CVE-2026-87995 Open WebUI: Same-origin XSS to account takeover via terminal port-preview iframe hardcoding allow-same-origin

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.11 until 0.11.1, src/lib/components/chat/FileNav/PortPreview.svelte rendered terminal port content in an iframe sandbox containing both allow-scripts and allow-same-origin. Because the terminal proxy...

CVE-2026-87995

Open WebUI versions 0.8.11 through 0.11.1 are affected by a same-origin XSS vulnerability in PortPreview.svelte. The terminal port content is rendered in an iframe sandbox that includes both allow-scripts and allow-same-origin. Because the terminal proxy serves content from the Open WebUI origin,...

PT-2026-89172

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.8.11 through 0.11.0 Description An issue exists where the in-app port preview renders content in an iframe sandbox that simultaneously grants allow-scripts and allow-same-origin. Because the terminal proxy serves this...

[SECURITY] [DSA 6463-1] webkit2gtk security update

------------------------------------------------------------------------- Debian Security Advisory DSA-6463-1 [email protected] https://www.debian.org/security/ Alberto Garcia August 24, 2026 https://www.debian.org/security/faq -...

Linux Distros Unpatched Vulnerability : CVE-2026-64728

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A permissions issue was addressed with improved validation. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS...

PYSEC-2026-3641 Open WebUI: Same-origin XSS to account takeover via terminal file-preview iframe hardcoding allow-same-origin

Summary Any authenticated user with access to a terminal server could get script of their choosing to run in the Open WebUI origin itself. The HTML file preview rendered terminal-served files in an iframe whose sandbox always granted allow-same-origin alongside allow-scripts, and the file is serv...

CVE-2026-66298

CVE-2026-66298 concerns Livebook’s JS-view sandbox where untrusted, notebook-defined JavaScript can trigger session-wide keyboard shortcuts. The root cause is in the trusted iframe shell forwarding every keydown to the parent without checking Event.isTrusted, allowing events synthesized by the un...

CVE-2026-70612: Improper Access Control

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, requests to open external protocol URLs from web content did not take iframe sandbox restrictions into account, so a sandboxed iframe could...

Open WebUI: Same-origin XSS to account takeover via terminal file-preview iframe hardcoding allow-same-origin

Summary Any authenticated user with access to a terminal server could get script of their choosing to run in the Open WebUI origin itself. The HTML file preview rendered terminal-served files in an iframe whose sandbox always granted allow-same-origin alongside allow-scripts, and the file is serv...

PT-2026-65261

Name of the Vulnerable Software and Affected Versions Safari versions prior to 26.6 iOS versions prior to 26.6 iPadOS versions prior to 26.6 macOS Tahoe versions prior to 26.6 tvOS versions prior to 26.6 visionOS versions prior to 26.6 watchOS versions prior to 26.6 Description A permissions issu...

Cross-site Scripting (XSS)

n8n is vulnerable to Cross-site Scripting XSS. The vulnerability is due to rendering HTML preview content in an iframe without the sandbox attribute and a sanitizer bypass, which allows an attacker with global member privileges to execute malicious scripts and perform authenticated actions using ...

PYSEC-2026-2760 Open WebUI vulnerable to Stored XSS via iFrame embeds in response messages

Summary Manually modifying chat history allows setting the embeds property on a response message, the content of which is loaded into an iFrame with a sandbox that has allow-scripts and allow-same-origin set, ignoring the "iframe Sandbox Allow Same Origin" configuration. This enables stored XSS o...

Open WebUI vulnerable to Stored XSS via iFrame embeds in response messages

SummaryManually modifying chat history allows setting the embeds property on a response message, the content of which is loaded into an iFrame with a sandbox that has allow-scripts and allow-same-origin set, ignoring the "iframe Sandbox Allow Same Origin" configuration. This enables stored XSS on...

Open WebUI has stored XSS via the HTML renedering view

SummaryThrough the HTML rendering view, scripts can be injected and executed. The finding resulted from a penetration test for a customer. It is suspected that the root cause of the issue lies within the core of Open WebUI, which is why it is being reported as a security issue here. Tested on Ope...

PT-2026-59401

Summary Manually modifying chat history allows setting the embeds property on a response message, the content of which is loaded into an iFrame with a sandbox that has allow-scripts and allow-same-origin set, ignoring the "iframe Sandbox Allow Same Origin" configuration. This enables stored XSS o...

CVE-2026-56354

n8n before 1.123.24, 2.10.4, and 2.12.0 across its 1.x and 2.x branches contains cross-site scripting and open redirect vulnerabilities in the Form Node due to unsanitized HTML description fields and overly permissive iframe sandbox policies. Authenticated users with workflow creation permissions...

CVE-2026-56354 n8n - Cross-Site Scripting and Open Redirect in Form Node

n8n before 1.123.24, 2.10.4, and 2.12.0 across its 1.x and 2.x branches contains cross-site scripting and open redirect vulnerabilities in the Form Node due to unsanitized HTML description fields and overly permissive iframe sandbox policies. Authenticated users with workflow creation permissions...

CVE-2026-56354 n8n - Cross-Site Scripting and Open Redirect in Form Node

n8n before 1.123.24, 2.10.4, and 2.12.0 across its 1.x and 2.x branches contains cross-site scripting and open redirect vulnerabilities in the Form Node due to unsanitized HTML description fields and overly permissive iframe sandbox policies. Authenticated users with workflow creation permissions...

CVE-2026-56354

CVE-2026-56354 affects n8n before 1.123.24, 2.10.4, and 2.12.0 (1.x and 2.x branches). The Form Node contains cross-site scripting and open redirect vulnerabilities caused by unsanitized HTML description fields and overly permissive iframe sandbox policies. Authenticated users with workflow creat...

PT-2026-57175

n8n before 1.123.24, 2.10.4, and 2.12.0 across its 1.x and 2.x branches contains cross-site scripting and open redirect vulnerabilities in the Form Node due to unsanitized HTML description fields and overly permissive iframe sandbox policies. Authenticated users with workflow creation permissions...