All vulnerabilities
CVE-2026-104816GHSA-p73x-6qrq-34jc

Misskey: Cross-site scripting in RSS feed item links

misskey-dev misskey
Open in ThreatlineRecord JSON
CVSS
8.5High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.63%Chance of exploitation activity in the next 30 days, higher than 49% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2026.7.0Fixed versionGitHub
Published13 Oct 2026Updated 13 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Misskey is an open source, federated social media platform. From 12.0.0 until 2026.7.0, the RSS components display feed item links from configured feeds without verifying their URL schemes. Missing URL scheme verification allows an attacker who controls feed content to provide an unsafe-scheme link that causes script execution when a user clicks it in an RSS widget. This issue is fixed in version 2026.7.0.

Text from CVE List

Affected versions 3

  • misskeyaffected: >= 12.0.0, <= 13.14.2CVE List
  • misskeyaffected: >= 2023.9.0-beta.1, < 2026.7.0CVE List
  • Misskey, n/a>= 12.0.0GitHub

References 4