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CVE-2026-71554

🗓️ 06 Aug 2026 21:46:43Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 84 Views

Pure Python h2 allows duplicate Host header, enabling request smuggling; fixed in version four one.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
githubexploit
GithubExploit
Exploit for CVE-2026-71554
7 Aug 202621:15
githubexploit
attackerkb
ATTACKERKB
CVE-2026-71554
6 Aug 202621:46
attackerkb
cgr
Chainguard
CVE-2026-71554 vulnerabilities
7 Aug 202620:22
cgr
circl
Circl
CVE-2026-71554
6 Aug 202623:32
circl
cvelist
Cvelist
CVE-2026-71554 h2: Duplicate Host header could facilitate request smuggling
6 Aug 202621:46
cvelist
debiancve
Debian CVE
CVE-2026-71554
6 Aug 202621:46
debiancve
euvd
EUVD
EUVD-2026-54177
6 Aug 202621:46
euvd
github
Github Security Blog
h2: Duplicate Host header could facilitate request smuggling
6 Aug 202621:53
github
nvd
NVD
CVE-2026-71554
6 Aug 202622:18
nvd
opensuse
OPENSUSE Linux
python313-h2-4.4.1-1.1 on GA media (moderate)
17 Aug 202600:00
opensuse
Rows per page
Vulners
Node
python-hyperh2Range<4.4.1
[
  {
    "vendor": "python-hyper",
    "product": "h2",
    "versions": [
      {
        "version": "< 4.4.1",
        "status": "affected"
      }
    ]
  }
]

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08 Aug 2026 03:16Current
5.4Medium risk
Vulners AI Score5.4
CVSS 3.15.3
EPSS0.00443
SSVC
84