CVE-2026-42557 jupyterlab: Command linker attributes in HTML enable one-click command execution from untrusted content

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. Prior to 4.5.7, JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all cli...

CVE-2026-42557

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. Prior to 4.5.7, JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all cli...

CVE-2026-42857

Open edX Platform enables the authoring and delivery of online learning at any scale. The HTML sanitizer cleanthreadhtmlbody used for discussion notification emails fails to remove...

JupyterLab's command linker attributes in HTML enable one-click command execution from untrusted content

JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all click events on document.body and executes the named command without checking whether the element came from trusted JupyterLab UI. A notebook with ...

PT-2026-38276

Name of the Vulnerable Software and Affected Versions JupyterLab versions prior to 4.5.7 Jupyter Notebook versions prior to 7.5.6 Description The HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements. Because CommandLinker listens for all click events...

UBUNTU-CVE-2026-41239

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Starting in version 1.0.10 and prior to version 3.4.0, SAFEFORTEMPLATES strips ... expressions from untrusted HTML. This works in string mode but not with RETURNDOM or RETURNDOMFRAGMENT, allowing XSS via...

UBUNTU-CVE-2026-41238

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions 3.0.1 through 3.3.3 are vulnerable to a prototype pollution-based XSS bypass. When an application uses DOMPurify.sanitize with the default configuration no CUSTOMELEMENTHANDLING option, a prior prototype...

CVE-2026-41238

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions 3.0.1 through 3.3.3 are vulnerable to a prototype pollution-based XSS bypass. When an application uses DOMPurify.sanitize with the default configuration no CUSTOMELEMENTHANDLING option, a prior prototype...

OPENSUSE-SU-2026:10569-1 ruby4.0-rubygem-rails-html-sanitizer-1.7.0-1.1 on GA media

These are all security issues fixed in the ruby4.0-rubygem-rails-html-sanitizer-1.7.0-1.1 package on the GA media of openSUSE Tumbleweed...

CVE-2026-40922

SiYuan is an open-source personal knowledge management system. In versions 3.6.1 through 3.6.3, a prior fix for XSS in bazaar README rendering incomplete fix for CVE-2026-33066 enabled the Lute HTML sanitizer, but the sanitizer does not block iframe tags, and its URL-prefix blocklist does not...

GHSA-CFG2-MXFJ-J6PW PraisonAI Vulnerable to Stored XSS via Unsanitized Agent Output in HTML Rendering (nh3 Not a Required Dependency)

Summary The Flask API endpoint in src/praisonai/api.py renders agent output as HTML without effective sanitization. The sanitizehtml function relies on the nh3 library, which is not listed as a required or optional dependency in pyproject.toml. When nh3 is absent the default installation, the...

CVE-2026-34718

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the HTML sanitizer for ticket articles was missing proper sanitization of data: ... URI schemes, resulting in storing such malicious content in the database of the Zammad instance. The Zammad GUI is...

CVE-2026-34718

CVE-2026-34718 affects Zammad, a web-based open source helpdesk system. The vulnerability stems from improper sanitization in the HTML sanitizer for ticket articles, which failed to neutralize certain data URI schemes, allowing malicious content to be stored in the database. The issue is mitigate...

[SECURITY] [DLA 4517-1] roundcube security update

Debian LTS Advisory DLA-4517-1 [email protected] https://www.debian.org/lts/security/ Guilhem Moulin March 30, 2026 https://wiki.debian.org/LTS Package : roundcube Version : 1.4.15+dfsg.1-1+deb11u8 CVE ID : not yet available Debian Bug : 1131182 1132268 Multiple vulnerabilities were...

USN-8097-2: roundcube regression

USN-8097-1 fixed a vulnerability in roundcube. The update caused a regression affecting the HTML sanitizer, preventing Roundcube from rendering any email message body. This update fixes the problem. We apologize for the inconvenience. Original advisory details: It was discovered that Roundcube...

USN-8097-2 roundcube regression

USN-8097-1 fixed a vulnerability in roundcube. The update caused a regression affecting the HTML sanitizer, preventing Roundcube from rendering any email message body. This update fixes the problem. We apologize for the inconvenience. Original advisory details: It was discovered that Roundcube...

Cross-site Scripting (XSS)

Overview loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Affected versions of this package are vulnerable to Cross-site Scripting XSS in the Loofah::HTML5::Scrub.alloweduri? function. An attacker can inject malicious script...

ruby4.0-rubygem-rails-html-sanitizer-1.6.0-1.9 on GA media (moderate)

ruby4.0-rubygem-rails-html-sanitizer-1.6.0-1.9 on GA media Announcement ID: openSUSE-SU-2026:10361-1 Rating: moderate Cross-References: CVE-2015-7578 CVE-2015-7579 CVE-2015-7580 CVE-2018-3741 CVE-2022-23517 CVE-2022-23518 CVE-2022-23519 CVE-2022-23520 CVE-2022-32209 CVSS scores: CVE-2018-3741 SUS...

PT-2026-33376

Name of the Vulnerable Software and Affected Versions SiYuan versions 3.6.1 through 3.6.3 Description An issue exists in the bazaar README rendering where the Lute HTML sanitizer fails to block iframe tags and does not effectively filter srcdoc attributes containing raw HTML. A malicious bazaar...

OPENSUSE-SU-2026:10361-1 ruby4.0-rubygem-rails-html-sanitizer-1.6.0-1.9 on GA media

These are all security issues fixed in the ruby4.0-rubygem-rails-html-sanitizer-1.6.0-1.9 package on the GA media of openSUSE Tumbleweed...