What’s Vulnerable › Vulnerabilities

CVE-2025-30346

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-21 · updated 2026-06-17
• Weakness: CWE-444

Description

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

Affected products

• varnish-software Varnish Enterprise: 6.0.11-r1, 6.0.11-r2, 6.0.11-r3, 6.0.11-r4, 6.0.11-r5, 6.0.11-r6 (+19)
• Varnish Cache Project Varnish Cache: before 7.6.2 — fixed in 7.6.2

How to fix

Upgrade to a fixed version: Varnish Cache Project Varnish Cache 7.6.2. Check the vendor advisory for mitigations.

References

• https://varnish-cache.org/security/VSV00015.html
• https://lists.debian.org/debian-lts-announce/2025/03/msg00027.html

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