What is the CVSS score of CVE-2025-30346?

CVE-2025-30346 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.2%.

Which versions of Varnish Enterprise are affected by CVE-2025-30346?

CVE-2025-30346 presents moderate security risk rated CVSS 5.4. Exploitation could compromise the security of affected deployments.. A patch is available.

How to fix or mitigate CVE-2025-30346?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Varnish Enterprise CVE-2025-30346

MEDIUM

HTTP Request/Response Smuggling (CWE-444)

2025-03-21 cve@mitre.org

Information Disclosure Red Hat Request Smuggling Suse Varnish Enterprise Varnish Cache Varnish Software Varnish Cache Project

5.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.4 MEDIUM

AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

SUSE

MEDIUM

qualitative

Red Hat

5.4 MEDIUM

qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

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

DescriptionCVE.org

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

AnalysisAI

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 ContextAI

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.

RemediationAI

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.