651 matches found
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...
Ruby on Rails: Rails::HTML::Sanitizer.allowed_uri? returns true for entity-encoded control-character-split javascript: URLs
A vulnerability was discovered in the Rails::HTML::Sanitizer.alloweduri? method of the rails-html-sanitizer library. The method incorrectly returned true for entity-encoded control-character-split javascript: URLs, which could lead to potential security issues if the application relied on the...
Nextcloud: SMIL values and by attributes bypass remote image blocking via unvalidated resource-loading animations, enabling email tracking without consent
A vulnerability was discovered in the HTML sanitizer of the Roundcube webmail client. The vulnerability allowed attackers to bypass the "Block remote images" security feature by using SMIL animation attributes to load arbitrary external resources without validation. This could have enabled email...
PT-2026-23795
Name of the Vulnerable Software and Affected Versions league/commonmark versions prior to 2.8.1 Description The DisallowedRawHtml extension in league/commonmark can be bypassed by inserting ASCII whitespace characters between a disallowed HTML tag name and the closing ''. For example, would pass...
Gogs: Stored XSS via data URI in issue comments
Summary A Stored Cross-site Scripting XSS vulnerability exists in the comment and issue description functionality. The application's HTML sanitizer explicitly allows data: URI schemes, enabling authenticated users to inject arbitrary JavaScript execution via malicious links. Details The...
CVE-2026-25543
HtmlSanitizer is a .NET library for cleaning HTML fragments and documents from constructs that can lead to XSS attacks. Prior to versions 9.0.892 and 9.1.893-beta, if the template tag is allowed, its contents are not sanitized. The template tag is a special tag that does not usually render its...
CVE-2026-25543 HtmlSanitizer has a bypass via template tag
HtmlSanitizer is a .NET library for cleaning HTML fragments and documents from constructs that can lead to XSS attacks. Prior to versions 9.0.892 and 9.1.893-beta, if the template tag is allowed, its contents are not sanitized. The template tag is a special tag that does not usually render its...
