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CVE-2026-39858

🗓️ 30 Apr 2026 20:26:26Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 80 Views

Traefik authentication can be bypassed via forwarded alias headers with underscores not sanitized.

Related
Detection
Affected
Refs
NVD
Vulners
Node
traefiktraefikRange<2.11.43
OR
traefiktraefikRange3.0.03.6.14
OR
traefiktraefikMatch3.7.0ea1
OR
traefiktraefikMatch3.7.0ea2
OR
traefiktraefikMatch3.7.0ea3
OR
traefiktraefikMatch3.7.0rc1
[
  {
    "vendor": "traefik",
    "product": "traefik",
    "versions": [
      {
        "version": "< 2.11.43",
        "status": "affected"
      },
      {
        "version": ">= 3.0.0-beta1, < 3.6.14",
        "status": "affected"
      },
      {
        "version": ">= 3.7.0-ea.1, < 3.7.0-rc.2",
        "status": "affected"
      }
    ]
  }
]

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15 Jul 2026 02:20Current
5.3Medium risk
Vulners AI Score5.3
CVSS 3.18.2 - 10
CVSS 47.8
EPSS0.00479
SSVC
80