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.
CVE-2026-57574
HIGHPre-NVD 7.47.4
EchelonGraph scoreLOW confidence
This high-severity CVE scores 7.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: secondary
7.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: —CVSS: 7.4Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.4
- EG Score
- 7.4(low)
- EPSS
- —
- KEV
- Not listed
Published
July 10, 2026
Last Modified
July 10, 2026
Advisory Details (4)
Auto-updated Jul 10, 2026Patch available. Sources: github_release, github, github_commit.
github Patch Available
TOTP tokens can be reused · Advisory · misskey-dev/misskey · GitHub
https://github.com/misskey-dev/misskey/security/advisories/GHSA-2m5x-5mp6-6vpqgithub_release Patch Available
2026.6.0
Patch available: misskey-dev/misskey 2026.6.0
https://github.com/misskey-dev/misskey/releases/tag/2026.6.0github_commit Patch Available
commit d323fe00d04a (misskey-dev/misskey)
Patch available: misskey-dev/misskey 2026.6.0 (contains commit d323fe00d04a)
https://github.com/misskey-dev/misskey/commit/d323fe00d04ac46ab0b4e66fce9169effaa8dfb7github_commit Patch Available
commit 00c6210a591d (misskey-dev/misskey)
Patch available: misskey-dev/misskey 2026.6.0 (contains commit 00c6210a591d)
https://github.com/misskey-dev/misskey/commit/00c6210a591db2b0be438740d05b82070fa68ac6Frequently asked(4)
What is CVE-2026-57574?
CVE-2026-57574 is a high vulnerability published on July 10, 2026. 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…
When was CVE-2026-57574 disclosed?
CVE-2026-57574 was first published in the National Vulnerability Database on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-57574?
CVE-2026-57574 has a CVSS v3 base score of 7.4 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-57574?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57574, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-57574
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