CVE-2025-47905

Varnish Cache before 7.6.3 and 7.7 before 7.7.1, and Varnish Enterprise before 6.0.13r14, allow client-side desync via HTTP/1 requests, because the product incorrectly permits CRLF to be skipped to delimit chunk boundaries.
HTTP Request/Response Smuggling
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.4 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
mitreCNA
5.4 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
CISA-ADPADP
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CVEADP
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Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 9%
Debian logo
Debian Releases
Debian Product
Codename
varnish
bullseye
vulnerable
bullseye (security)
6.5.1-1+deb11u5
fixed
bookworm
vulnerable
bookworm (security)
7.1.1-2+deb12u1
fixed
sid
7.7.0-2
fixed
trixie
7.7.0-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
varnish
plucky
needs-triage
oracular
needs-triage
noble
needs-triage
jammy
needs-triage
focal
needs-triage
bionic
needs-triage
xenial
needs-triage
trusty
needs-triage