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CVE-2026-59900

🗓️ 29 Jul 2026 17:58:35Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 169 Views

Netty HTTP/2 to HTTP/1.x translation may duplicate Host headers, enabling routing bypass.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-59900
29 Jul 202617:58
attackerkb
cgr
Chainguard
CVE-2026-59900 vulnerabilities
24 Jul 202608:23
cgr
circl
Circl
CVE-2026-59900
10 Aug 202613:20
circl
cvelist
Cvelist
CVE-2026-59900 Netty codec-http2: Lack of Host Header Deduplication in HTTP/2→HTTP/1.x Translation Leads to Request Routing Bypass
29 Jul 202617:58
cvelist
debiancve
Debian CVE
CVE-2026-59900
29 Jul 202617:58
debiancve
euvd
EUVD
EUVD-2026-50442
29 Jul 202617:58
euvd
github
Github Security Blog
Netty: [codec-http2] Lack of Host Header Deduplication in HTTP/2→HTTP/1.x Translation Leads to Request Routing Bypass
22 Jul 202621:49
github
nvd
NVD
CVE-2026-59900
29 Jul 202618:16
nvd
osv
OSV
CGA-F267-869R-XG8P
24 Jul 202607:42
osv
osv
OSV
DEBIAN-CVE-2026-59900
29 Jul 202618:16
osv
Rows per page
NVD
Vulners
Node
OR
nettynettyRange<4.1.136
nettynettyRange4.2.04.2.16
[
  {
    "vendor": "netty",
    "product": "netty",
    "versions": [
      {
        "version": ">= 4.2.0.Final, < 4.2.16.Final",
        "status": "affected"
      },
      {
        "version": "< 4.1.136.Final",
        "status": "affected"
      }
    ]
  }
]

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06 Aug 2026 20:29Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.15.3
CVSS 46.9
EPSS0.00232
SSVC
169