CVE-2026-57574: Misskey: TOTP tokens can be reused
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Misskeyto a version that resolves this vulnerability.Fixed in 2026.6.0
Event History
Frequently Asked Questions
What is the severity of CVE-2026-57574?
CVE-2026-57574 has a severity rating of high with a score of 7.4.
How do I fix CVE-2026-57574?
To fix CVE-2026-57574, update Misskey to version 2026.6.0 or later.
What does CVE-2026-57574 affect?
CVE-2026-57574 affects the Time-based One-Time Password (TOTP) authentication feature in Misskey.
What is the risk associated with CVE-2026-57574?
The risk associated with CVE-2026-57574 is the possibility of reusing valid TOTP tokens within their time step.
When was CVE-2026-57574 published?
CVE-2026-57574 was published on July 10, 2026.