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TI-2026-22009 Aliases CVE-2026-27627

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

Priority HIGH 69CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00372 31st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
karakeep-appkarakeep= 0.30.0—No fix listedCNA
  • karakeep Vendorkarakeep-app Affected = 0.30.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:localhostlabs:karakeep:0.30.0:*:*:*:*:-:*:*0.30.0VulnerableLocalhostlabs
  • cpe:2.3:a:localhostlabs:karakeep:0.30.0:*:*:*:*:-:*:* Versions 0.30.0 Vulnerable ·Localhostlabs

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27627

References

Exploit 1

Patch 1

Other 1

  • TI-2026-32929 Karakeep has a SSRF Protection Bypass via Redirect Handling CVSS 3.1HIGH 7.6
  • TI-2026-53043 karakeep-app karakeep OAuth Sign-In auth.ts improper authentication CVSS 4.0MEDIUM 6.3
  • TI-2026-53042 karakeep-app karakeep Login Endpoint auth.ts authorize excessive authentication CVSS 4.0MEDIUM 6.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences