CVE-2025-30346

MEDIUM
2025-03-21 [email protected]
5.4
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

3
Patch Released
Apr 05, 2026 - 20:30 nvd
Patch available
Analysis Generated
Mar 28, 2026 - 18:32 vuln.today
CVE Published
Mar 21, 2025 - 07:15 nvd
MEDIUM 5.4

Tags

Information Disclosure Request Smuggling Varnish Enterprise Varnish Cache Redhat Suse

Description

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

Analysis

Varnish Cache before 7.6.2 and Varnish Enterprise before 6.0.13r10 allow client-side desync via HTTP/1 requests. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Technical Context

This vulnerability is classified as HTTP Request/Response Smuggling (CWE-444), which allows attackers to manipulate HTTP request interpretation between frontend and backend servers. Varnish Cache before 7.6.2 and Varnish Enterprise before 6.0.13r10 allow client-side desync via HTTP/1 requests. Affected products include: Varnish-Software Varnish Enterprise, Varnish Cache Project Varnish Cache. Version information: before 7.6.2.

Affected Products

Varnish-Software Varnish Enterprise, Varnish Cache Project Varnish Cache.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Enforce strict HTTP parsing, normalize requests at proxy layer, use HTTP/2 end-to-end, reject ambiguous headers.

Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: +0.2
CVSS: +27
POC: 0

Vendor Status

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CVE-2025-30346 vulnerability details – vuln.today
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