XSS in Karakeep-App Karakeep
CVE-2026-27627
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (30.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Karakeep-App Karakeep — versions = 0.30.0
- Localhostlabs Karakeep — versions 0.30.0
Weakness classification (CWE)
References
- github.com/karakeep-app/karakeep/security/advisories/GHSA-mg93-f9mw-wpgj (Exploit, Vendor Advisory)
- github.com/karakeep-app/karakeep/commit/ba3db953c0d8675e2e3ecc29113a332b570b2cb9 (Patch)
- github.com/karakeep-app/karakeep/releases/tag/v0.31.0 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-27627?
- CVE-2026-27627 is a high-severity vulnerability in Karakeep-App Karakeep, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2026-02-25.
- How severe is CVE-2026-27627?
- High severity. CVSS v3 base score is 8.2 out of 10.