Vulnerability · Published Feb 25, 2026 · Assigned by GitHub_M

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

High 8.2

In plain English

A high-severity cross-site scripting in karakeep from karakeep-app. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).

Severity (CVSS 3.1)8.2High

Exploit odds (30 days)0.4%top 68.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
karakeep-app	karakeep	= 0.30.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

References

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