Home/CVE/In Varnish Cache before 6.6.2 and 7.x before 7.0.2, Varnish Cache 6.0 LTS before 6.0.10, and and Varnish Enterprise (Cac
CVE

CVE-2022-23959

In Varnish Cache before 6.6.2 and 7.x before 7.0.2, Varnish Cache 6.0 LTS before 6.0.10, and and Varnish Enterprise (Cac

In Varnish Cache before 6.6.2 and 7.x before 7.0.2, Varnish Cache 6.0 LTS before 6.0.10, and Varnish Enterprise (Cache Plus) 4.1.x before 4.1.11r6 and 6.0.x before 6.0.9r4, request smuggling can occur for HTTP/1 connections.

CRITICAL · CVSS 9.1 EPSS 0.00344
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
▤

Affected Products & Versions

8
varnish-software varnich cache>= 1.0.0 and < 6.6.2
varnish-software varnich cache>= 4.1.1 and < 4.1.11r6
varnish-software varnich cacheall versions
varnish-software varnish cache>= 6.0.0 and < 6.0.10
varnish-software varnish cache plus>= 6.0.0 and < 6.0.9r4
varnish cache project varnish cache>= 7.0.0 and < 7.0.2
fedoraproject fedoraall versions
debian linuxall versions
▣

Scoring & Timeline

9.1
CRITICAL · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 Jan 2022 · 01:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
⚑

Vendor Advisories

9
suse-csafopenSUSE-SU-2026:10751-1
suse-csafopenSUSE-SU-2024:12086-1
usnUSN-5474-1
suse-csafopenSUSE-SU-2022:0148-1
rhsaRHSA-2022:0418Important
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://docs.varnish-software.com/security/VSV00008/MitigationVendor Advisory
https://lists.debian.org/debian-lts-announce/2022/02/msg00014.htmlMailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UMMDMQWNAE3BTSZUHXQHVAMZC5TLHLYT/
https://varnish-cache.org/security/VSV00008.htmlMitigationVendor Advisory
https://www.debian.org/security/2022/dsa-5088Third Party Advisory
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