CVE-2025-47905
Published:May 13, 2025
Updated:May 17, 2026
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.
Affected Packages
https://github.com/varnishcache/varnish-cache.git (GITHUB):
Affected version(s) >=varnish-7.6.0 <varnish-7.6.3Fix Suggestion:
Update to version varnish-7.6.3https://github.com/varnishcache/varnish-cache.git (GITHUB):
Affected version(s) >=varnish-4.0.3 <varnish-6.0.14Fix Suggestion:
Update to version varnish-6.0.14https://github.com/varnishcache/varnish-cache.git (GITHUB):
Affected version(s) =varnish-7.7.0 <varnish-7.7.1Fix Suggestion:
Update to version varnish-7.7.1Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.4
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
EPSS
Base Score:
0.29