GHSA-RP9W-3FW7-7CWQ DOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside <template>.content

If the HTML you give it contains a element, and inside that template there's an element with a shadow DOM attached to it, DOMPurify quietly skips over the shadow contents. Whatever the attacker put in there - an image with an onerror handler, a link with a javascript: URL, even a full script -...

PT-2026-42767

Name of the Vulnerable Software and Affected Versions DOMPurify version 3.4.4 Description DOMPurify allows the element by default, which enables a bypass of the sanitization process. This occurs because browsers may re-clone an XSS payload after the sanitizer has already processed the subtree...

Cross-site Scripting (XSS)

Overview trix is a Rich Text Editor. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the data-trix-serialized-attributes attribute bypassing the DOMPurify sanitizer. An attacker can execute arbitrary JavaScript code within the user's session by crafting HTML...

Cross-site Scripting (XSS)

Overview org.webjars.npm:trix is a Rich Text Editor. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the data-trix-serialized-attributes attribute bypassing the DOMPurify sanitizer. An attacker can execute arbitrary JavaScript code within the user's session by...

Trix has a Stored XSS vulnerability through serialized attributes

Impact The Trix editor, in versions prior to 2.1.17, is vulnerable to XSS attacks when a data-trix-serialized-attributes attribute bypasses the DOMPurify sanitizer. An attacker could craft HTML containing a data-trix-serialized-attributes attribute with a malicious payload that, when the content ...

CVE-2026-27627 Karakeep's Reddit plugin content bypasses DOMPurify sanitization, enabling stored XSS

Karakeep is a elf-hostable bookmark-everything app. In version 0.30.0, when the Reddit metascraper plugin returns readableContentHtml, the HTML parsing subprocess uses it directly without running it through DOMPurify. Every other content source in the crawler goes through Readability + DOMPurify,...

CVE-2026-27627 Karakeep's Reddit plugin content bypasses DOMPurify sanitization, enabling stored XSS

Karakeep is a elf-hostable bookmark-everything app. In version 0.30.0, when the Reddit metascraper plugin returns readableContentHtml, the HTML parsing subprocess uses it directly without running it through DOMPurify. Every other content source in the crawler goes through Readability + DOMPurify,...

CVE-2026-27627 Karakeep's Reddit plugin content bypasses DOMPurify sanitization, enabling stored XSS

Karakeep is a elf-hostable bookmark-everything app. In version 0.30.0, when the Reddit metascraper plugin returns readableContentHtml, the HTML parsing subprocess uses it directly without running it through DOMPurify. Every other content source in the crawler goes through Readability + DOMPurify,...

CVE-2026-27627

Summary: CVE-2026-27627 affects Karakeep’s Reddit metascraper path. In version 0.30.0, the HTML returned as readableContentHtml by the Reddit plugin is consumed directly by the HTML parsing subprocess without DOMPurify sanitization, while other content sources go through Readability + DOMPurify. ...