CVE-2025-30346 — HTTP Request Smuggling in Varnish Cache

CWE-444 — HTTP Request Smuggling6 documents6 sources
Severity
4.8MEDIUMNVD
CNA5.4
EPSS
0.2%
top 61.99%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Varnish-software Varnish CacheVarnish-cache VarnishVarnish Cache Project Varnish Cache+1 more
Timeline
PublishedMar 21

Description

Varnish Cache before 7.6.2 and Varnish Enterprise before 6.0.13r10 allow client-side desync via HTTP/1 requests.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:NExploitability: 2.2 | Impact: 2.5

Affected Packages4 packages

▶CVEListV5varnish-software/varnish_cache7.5.0 — 7.6.2
▶Debianvarnish-cache/varnish< 6.5.1-1+deb11u4+3
▶NVDvarnish-software/varnish_enterprise6.0.11, 6.0.12, 6.0.13+2

🔴Vulnerability Details

3
CVEList
CVE-2025-30346: Varnish Cache before 7↗2025-03-21
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OSV
CVE-2025-30346: Varnish Cache before 7↗2025-03-21
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GHSA
GHSA-hxcm-q7m2-7qhp: Varnish Cache before 7↗2025-03-21
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📋Vendor Advisories

2
Red Hat
varnish: Client-Side Desynchronization in Varnish Cache↗2025-03-21
▶
Debian
CVE-2025-30346: varnish - Varnish Cache before 7.6.2 and Varnish Enterprise before 6.0.13r10 allow client-...↗2025
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CVE-2025-30346 — HTTP Request Smuggling | cvebase