CVE-2026-57574CWE-294

Misskey: TOTP tokens can be reused

High · published July 10, 2026

CVSS v4.0
7.4
EPSS
1%
Percentile
45.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.4 · HIGH
Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00551 · 45.3th percentile
Weakness
CWE-294 · Authentication Bypass by Capture-replay
Published
2026-07-10T20:55Z
EPSS history
Timeline
  • 10 JUL 20:55Z
    Misskey: TOTP tokens can be reused
    cvelistv5