CVE-2026-57574highCWE-294

CVE-2026-57574: high-severity vulnerability in misskey-dev misskey

Misskey: TOTP tokens can be reused

Published · Updated

Follow this CVE+ Monitor misskey

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.4epss 0.6%
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.
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
Affected products
misskey-dev · misskey
Related CVEs — misskey-dev misskey

In the same product, most dangerous first.

CVE-2021-39195HIGHServer-Side Request Forgery vulnerability in misskeyEPSS 1.1%CVE-2023-43793HIGHMisskey allows users to bypass authentication of Bull dashboardEPSS 0.8%CVE-2021-39169HIGHXSS vulnerability using dialogEPSS 0.7%CVE-2023-24812HIGHSQL injection of notes/search-by-tagEPSS 0.7%CVE-2024-25636HIGHLack of media type verification of Activity Streams objects allows impersonation and takeover of remote accountsEPSS 0.7%CVE-2026-104816HIGHMisskey: Cross-site scripting in RSS feed item linksEPSS 0.6%