CVE-2026-27627: Localhostlabs Karakeep

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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, but the Reddit path skips both. Since this content ends up in `dangerouslySetInnerHTML` in the reader view, any malicious HTML in the Reddit response gets executed in the user's browser. Version 0.31.0 contains a patch for this issue.

Affected products

• Localhostlabs Karakeep: version 0.30.0 only

Published 2026-02-25. Last modified 2026-06-17.