CVE-2026-57574
Misskey: TOTP tokens can be reused
- State
- Published
- Severity
- 7.4 High
- Published
- Jul 10, 2026
- Updated
- Jul 13, 2026
- Reserved
- Jun 24, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.4 High | 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 | GitHub_M |
Weaknesses
- CWE-294 Authentication Bypass by Capture-replay
Affected Products
| Product | Versions |
|---|---|
misskeymisskey-dev |
|
References
- https://github.com/misskey-dev/misskey/security/advisories/GHSA-2m5x-5mp6-6vpq
- https://github.com/misskey-dev/misskey/commit/00c6210a591db2b0be438740d05b82070fa68ac6
- https://github.com/misskey-dev/misskey/commit/d323fe00d04ac46ab0b4e66fce9169effaa8dfb7
- https://github.com/misskey-dev/misskey/releases/tag/2026.6.0
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