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CVE-2026-71326 Traefik: BasicAuth singleflight key collision allows authenticated identity spoofing

🗓️ 06 Aug 2026 16:34:23Reported by GitHub_MType 
cve
 cve
🔗 www.cve.org👁 10 Views

Traefik is an open source HTTP reverse proxy and load balancer. From 3.6.11 until 3.6.25 and 3.7.10, Traefik's BasicAuth middleware in pkg/middlewares/auth/basic_auth.go deduplicates concurrent password checks with a singleflight key built from th...

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Detection
Affected
Refs
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Node
OR
traefiktraefikRange3.6.113.6.25
traefiktraefikRange3.7.03.7.10
[
  {
    "vendor": "traefik",
    "product": "traefik",
    "versions": [
      {
        "version": ">= 3.6.11, < 3.6.25",
        "status": "affected"
      },
      {
        "version": ">= 3.7.0, < 3.7.10",
        "status": "affected"
      }
    ]
  }
]

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06 Aug 2026 16:34Current
CVSS 42.1
10