CVE-2026-27627CWE-79

Karakeep's Reddit plugin content bypasses DOMPurify sanitization, enabling stored XSS

High · published February 25, 2026

CVSS v3.1
8.2
EPSS
0%
Percentile
32.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00393 · 32.4th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-25T03:48Z
EPSS history
Timeline
  • 25 FEB 03:48Z
    Karakeep's Reddit plugin content bypasses DOMPurify sanitization, enabling stored XSS
    cvelistv5