PT-2026-96247

Name of the Vulnerable Software and Affected Versions Joplin versions 1.4.0 through 3.7.1 Description In the packages/renderer/MdToHtml/rules/katex.ts file, the application enables the trust option for KaTeX note content. This allows an author to insert a href URL into the rendered output that...

CVE-2026-55105: Improper Neutralization of Input During Web Page Generation

Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.6.15 and 3.7.2, packages/renderer/MdToHtml/rules/fountain.ts passes HTML generated by the vendored fountain.js renderer into note output without sanitizing it. A malicious Fountain...

PT-2026-96276

Name of the Vulnerable Software and Affected Versions Joplin versions prior to 3.6.15 Joplin versions prior to 3.7.2 Description In the packages/renderer/MdToHtml/rules/fountain.ts file, HTML generated by the vendored fountain.js renderer is passed into the note output without sanitization. This...

CVE-2026-54743: Improper Neutralization of Input During Web Page Generation

Lemmy is a link aggregator and forum for the fediverse. Prior to lemmy-ui 0.19.19-beta.1, LemmyNet/lemmy-ui renders Markdown in src/shared/markdown.ts for post bodies, comment bodies, private messages, and community and site sidebars through mdToHtml, which returns a raw html object that Inferno...