PT-2026-21852 · Reddit+1 · Reddit Metascraper Plugin+1

Byamb4 · Published 2026-02-25 · Updated 2026-03-10 · CVE-2026-27627

Positive Technologies (AI Summary)

CVSS v3.1

8.2

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Name of the Vulnerable Software and Affected Versions Karakeep version 0.30.0

Description Karakeep is an elf-hostable bookmark-everything app. Version 0.30.0 does not properly sanitize HTML content received from the Reddit metascraper plugin. Specifically, when the plugin returns readableContentHtml, the application directly uses this content in the HTML parsing subprocess without running it through DOMPurify. This unsanitized content is then injected into the application’s Document Object Model (DOM) via React’s dangerouslySetInnerHTML, potentially allowing malicious HTML to be executed in a user’s browser.

Recommendations Update to version 0.31.0 to address this issue.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-27627

GHSA-MG93-F9MW-WPGJ

Affected Products

Karakeep

Reddit Metascraper Plugin

References · 14

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27627.json · Exploit
• https://github.com/karakeep-app/karakeep/security/advisories/GHSA-mg93-f9mw-wpgj · Vendor Advisory
• https://github.com/karakeep-app/karakeep/commit/ba3db953c0d8675e2e3ecc29113a332b570b2cb9 · Patch
• https://osv.dev/vulnerability/CVE-2026-27627 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27627 · Security Note
• https://github.com/karakeep-app/karakeep/releases/tag/v0.31.0 · Note
• https://t.me/CVEtracker/45678 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2026553181061161196 · Twitter Post
• https://twitter.com/CVEnew/status/2026641351178059890 · Twitter Post
• https://twitter.com/CveTodo/status/2026515005508665438 · Twitter Post
• https://t.me/cveNotify/154959 · Telegram Post
• https://t.me/cveNotify/153560 · Telegram Post
• https://twitter.com/cracbot/status/2028425202959593962 · Twitter Post
• https://t.me/cveNotify/153096 · Telegram Post