---
id: CVE-2026-57574
title: 'Misskey is an open source, federated social media platform'
summary: >-
  Misskey is an open source, federated social media platform. Prior to 2026.6.0,
  Misskey contains a vulnerability in Time-based One-Time Password (TOTP)
  authentication in UserAuthService where insufficient validation of used tokens
  allows …
severity: none
cwe:
  - CWE-294
published: '2026-07-10'
updated: '2026-07-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-57574'
references:
  - url: >-
      https://github.com/misskey-dev/misskey/commit/00c6210a591db2b0be438740d05b82070fa68ac6
    label: security-advisories@github.com
  - url: >-
      https://github.com/misskey-dev/misskey/commit/d323fe00d04ac46ab0b4e66fce9169effaa8dfb7
    label: security-advisories@github.com
  - url: 'https://github.com/misskey-dev/misskey/releases/tag/2026.6.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/misskey-dev/misskey/security/advisories/GHSA-2m5x-5mp6-6vpq
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00551
epssPercentile: 0.43737
ingestedAt: '2026-07-11T20:15:27.380Z'
---

## Overview

Misskey is an open source, federated social media platform. Prior to 2026.6.0, Misskey contains a vulnerability in Time-based One-Time Password (TOTP) authentication in UserAuthService where insufficient validation of used tokens allows the reuse of a single-use code within its valid time step. If both credentials and a TOTP code are obtained concurrently, an attacker may reuse the code to perform unauthorized actions, potentially leading to account takeover. This issue is fixed in version 2026.6.0.

## Remediation

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