What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-25 · updated 2026-06-17
• Weakness: CWE-79

Description

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

• karakeep-app karakeep: 0.30.0

References

• https://github.com/karakeep-app/karakeep/commit/ba3db953c0d8675e2e3ecc29113a332b570b2cb9
• https://github.com/karakeep-app/karakeep/releases/tag/v0.31.0
• https://github.com/karakeep-app/karakeep/security/advisories/GHSA-mg93-f9mw-wpgj

Get alerted when CVE-2026-27627 or the next vulnerability affects your stack