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CVE

CVE-2026-27627

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

CVE-2026-27627

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

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.2
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
C
H
U
-

Related Resources

No items found.

References

https://github.com/karakeep-app/karakeep/releases/tag/v0.31.0, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27627.json, https://github.com/karakeep-app/karakeep/security/advisories/GHSA-mg93-f9mw-wpgj, https://nvd.nist.gov/vuln/detail/CVE-2026-27627, https://github.com/karakeep-app/karakeep/commit/ba3db953c0d8675e2e3ecc29113a332b570b2cb9

Severity

8.2

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
8.2
EPSS Probability
0.00056%
EPSS Percentile
0.17292%
Introduced Version
0
Fix Available
ba3db953c0d8675e2e3ecc29113a332b570b2cb9

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