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EUVD-2026-21738

🗓️ 12 Apr 2026 21:30:19Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 29 Views

Varnish Cache 9 before 9.0.1 and Varnish Enterprise before 6.0.16r11 expose a workspace overflow denial of service during HTTP/2 upgrade from speculative HTTP/1 transport.

Related
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
cve
CVE
CVE-2026-40394
12 Apr 202619:17
–cve
cvelist
Cvelist
CVE-2026-40394
12 Apr 202619:17
–cvelist
debiancve
Debian CVE
CVE-2026-40394
12 Apr 202619:17
–debiancve
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
[
  {
    "enisaIdVendor": [
      {
        "id": "1e5a0506-afa1-3526-b88a-39fc463f3938",
        "vendor": {
          "name": "varnish-software"
        }
      }
    ],
    "enisaIdProduct": [
      {
        "id": "c255f439-d20a-30d9-8118-5b9aa6e0e51f",
        "product": {
          "name": "Varnish Cache"
        },
        "product_version": "9.0.0 <9.0.1"
      }
    ]
  }
]

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12 Apr 2026 21:30Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.14
EPSS0.00405
29