---
id: CVE-2026-104816
title: 'Misskey is an open source, federated social media platform'
summary: >-
  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
  attac…
severity: high
cvss: 8.5
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N'
cwe:
  - CWE-79
vendor: misskey-dev
product: misskey
affected:
  - 'misskey >= 12.0.0, <= 13.14.2'
  - 'misskey >= 2023.9.0-beta.1, < 2026.7.0'
published: '2026-10-13'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T20:04:29.760'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104816'
references:
  - url: >-
      https://github.com/misskey-dev/misskey/commit/8dd59a8c06da49b8f302d902d73d04397ee29366
    label: security-advisories@github.com
  - url: 'https://github.com/misskey-dev/misskey/pull/17831'
    label: security-advisories@github.com
  - url: 'https://github.com/misskey-dev/misskey/releases/tag/2026.7.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/misskey-dev/misskey/security/advisories/GHSA-p73x-6qrq-34jc
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
epss: 0.0063
epssPercentile: 0.49998
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-13T20:19:04.007207Z'
cvssSource: cna
ingestedAt: '2026-10-13T19:43:28.909Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.