CVE-2026-34475

Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://vinyl-cache.org/security/VSV00018.html	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:varnish-software:varnish_enterprise::::::::
	cpe:2.3:a:varnish-software:varnish_enterprise:6.0.16:r1::::::
	cpe:2.3:a:varnish-software:varnish_enterprise:6.0.16:r10::::::
	cpe:2.3:a:varnish-software:varnish_enterprise:6.0.16:r11::::::
	cpe:2.3:a:varnish-software:varnish_enterprise:6.0.16:r2::::::
	cpe:2.3:a:varnish-software:varnish_enterprise:6.0.16:r3::::::
	cpe:2.3:a:varnish-software:varnish_enterprise:6.0.16:r4::::::
	cpe:2.3:a:varnish-software:varnish_enterprise:6.0.16:r5::::::
	cpe:2.3:a:varnish-software:varnish_enterprise:6.0.16:r6::::::
	cpe:2.3:a:varnish-software:varnish_enterprise:6.0.16:r7::::::
	cpe:2.3:a:varnish-software:varnish_enterprise:6.0.16:r8::::::
	cpe:2.3:a:varnish-software:varnish_enterprise:6.0.16:r9::::::

Configuration 2 (hide)

cpe:2.3:a:vinyl-cache:vinyl_cache:*:*:*:*:*:*:*:*

History

26 Oct 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) Varnish Cache anterior a la versión 8.0.1 y Varnish Enterprise anterior a la versión 6.0.16r12, en ciertos escenarios de req.url no verificados, manejan incorrectamente las URL con una ruta de / para HTTP/1.1, lo que podría llevar a envenenamiento de caché u omisión de autenticación.

Information

Published : 2026-03-27 20:16

Updated : 2026-10-26 22:10

NVD link : CVE-2026-34475

Mitre link : CVE-2026-34475

CVE.ORG link : CVE-2026-34475

JSON object : View

Products Affected

vinyl-cache

vinyl_cache

varnish-software

varnish_enterprise

CWE

CWE-180

Incorrect Behavior Order: Validate Before Canonicalize

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