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CVE-2026-40394

🗓️ 12 Apr 2026 19:17:34Reported by mitreType 
cve
 cve
🔗 web.nvd.nist.gov👁 91 Views

Varnish Cache workspace overflow DoS during HTTP/2 upgrade from HTTP/1 with prefetched data.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-40394
12 Apr 202619:17
–attackerkb
circl
Circl
CVE-2026-40394
12 Apr 202622:02
–circl
cnnvd
CNNVD
Varnish Cache and Varnish Enterprise security vulnerabilities
12 Apr 202600:00
–cnnvd
cvelist
Cvelist
CVE-2026-40394
12 Apr 202619:17
–cvelist
debiancve
Debian CVE
CVE-2026-40394
12 Apr 202619:17
–debiancve
euvd
EUVD
EUVD-2026-21738
12 Apr 202621:30
–euvd
mend
Mend
CVE-2026-40394
12 Apr 202619:17
–mend
nvd
NVD
CVE-2026-40394
12 Apr 202620:16
–nvd
osv_debian
osv_debian
DEBIAN-CVE-2026-40394
12 Apr 202620:16
–osv_debian
osv_ubuntu
osv_ubuntu
UBUNTU-CVE-2026-40394
12 Apr 202620:16
–osv_ubuntu
Rows per page
[
  {
    "defaultStatus": "unaffected",
    "product": "Varnish Cache",
    "vendor": "varnish-software",
    "versions": [
      {
        "lessThan": "9.0.1",
        "status": "affected",
        "version": "9.0.0",
        "versionType": "semver"
      }
    ]
  }
]

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26 Oct 2026 21:10Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.14 - 7.5
EPSS0.00236
SSVC
91