Varnish Software Varnish Cache By Varnish Software vulnerabilities

1 vulnerability

Known vulnerabilities in Varnish Software Varnish Cache By Varnish Software, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.

2.3CVE-2026-50052debianvarnish+5
EPSS score
0.47%
In Vinyl Cache before 9.0.1 and Varnish Cache before 9.0.3, a deficiency in HTTP/2 request parsing can be exploited to launch a backend request desync attack (request smuggling), which in turn can be used for cache poisoning, authentication bypass, or possibly even information disclosure and manipulation. The attack vector only exists if HTTP/2 support is enabled by setting the feature parameter to contain +http2. HTTP/2 support is disabled by default.