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CVE-2026-77561 Tinyauth: Unauthenticated login attempts can trigger global login lockdown denial of service

🗓️ 21 Sep 2026 16:48:21Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 10 Views

Tinyauth is an authentication and authorization server. Prior to 5.1.0, an unauthenticated remote attacker can send POST /api/user/login requests with 257 distinct nonexistent usernames to fill MaxLoginAttemptRecords and activate a global login lo...

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Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-77561
21 Sep 202617:44
circl
cve
CVE
CVE-2026-77561
21 Sep 202616:48
cve
euvd
EUVD
EUVD-2026-84015
21 Sep 202616:48
euvd
nvd
NVD
CVE-2026-77561
21 Sep 202617:18
nvd
[
  {
    "vendor": "tinyauthapp",
    "product": "tinyauth",
    "versions": [
      {
        "version": "< 5.1.0",
        "status": "affected"
      }
    ]
  }
]

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21 Sep 2026 16:48Current
CVSS 3.15.3
10