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CVE-2026-88008

🗓️ 10 Sep 2026 14:57:06Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 78 Views🌐 WEB

Traefik HTTP request smuggling via h2c upgrade bypasses auth on shared backends.

Related
Detection
Affected
Refs
Paths
NVD
Vulners
Node
OR
traefiktraefikRange2.11.26–2.11.57
traefiktraefikRange3.4.2–3.7.13
[
  {
    "vendor": "traefik",
    "product": "traefik",
    "versions": [
      {
        "version": ">= 2.11.26, < 2.11.57",
        "status": "affected"
      },
      {
        "version": ">= 3.4.2, < 3.7.13",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
Connectionpath/public.htmlEdge path used to trigger h2c upgrade and forward the HTTP/2 settings to the backend, enabling a tunnel bypass of routers/middleware.CWE-444, CWE-863
Upgradepath/public.htmlEdge path used to trigger h2c upgrade and forward the HTTP/2 settings to the backend, enabling a tunnel bypass of routers/middleware.CWE-444, CWE-863
HTTP2-Settingspath/public.htmlEdge path used to trigger h2c upgrade and forward the HTTP/2 settings to the backend, enabling a tunnel bypass of routers/middleware.CWE-444, CWE-863

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14 Sep 2026 19:59Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.19.1
CVSS 47
EPSS0.00487
SSVC
78