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CVE-2026-84378 HTTPX2: Quadratic SSE line buffering can cause CPU denial of service

🗓️ 02 Sep 2026 17:54:19Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 45 Views

HTTPX2 2.5.0-2.10.0 quadratic SSE line buffering enables CPU denial of service.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-84378
2 Sep 202619:40
–circl
cve
CVE
CVE-2026-84378
2 Sep 202617:54
–cve
debiancve
Debian CVE
CVE-2026-84378
2 Sep 202617:54
–debiancve
euvd
EUVD
EUVD-2026-70242
8 Sep 202620:45
–euvd
fedora
Fedora
[SECURITY] Fedora 44 Update: python-httpx2-2.13.1-1.fc44
3 Oct 202601:12
–fedora
nessus
Tenable Nessus
Fedora 44 : python-httpx2 (2026-a69588e2cd)
3 Oct 202600:00
–nessus
nessus
Tenable Nessus
Linux Distros Unpatched Vulnerability : CVE-2026-84378
3 Sep 202600:00
–nessus
github
Github Security Blog
HTTPX2: Quadratic SSE line buffering can cause CPU denial of service
8 Sep 202620:45
–github
mend
Mend
CVE-2026-84378
2 Sep 202617:54
–mend
nvd
NVD
CVE-2026-84378
2 Sep 202618:21
–nvd
Rows per page
[
  {
    "vendor": "pydantic",
    "product": "httpx2",
    "versions": [
      {
        "version": ">= 2.5.0, < 2.10.0",
        "status": "affected"
      }
    ]
  }
]

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