CVE-2026-34475 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Varnish-software Subscribe	Varnish Cache Subscribe

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://vinyl-cache.org/security/VSV00018.html

History

Fri, 27 Mar 2026 20:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Fri, 27 Mar 2026 20:00:00 +0000

Type	Values Removed	Values Added
Description		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.
First Time appeared		Varnish-software Varnish-software varnish Cache
Weaknesses		CWE-180
CPEs		cpe:2.3:a:varnish-software:varnish_cache::::::::
Vendors & Products		Varnish-software Varnish-software varnish Cache
References		https://vinyl-cache.org/security/VSV00018.html
Metrics		cvssV3_1 `{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-03-27T19:40:28.397Z

Updated: 2026-03-27T20:01:11.327Z

Reserved: 2026-03-27T19:40:27.986Z

Link: CVE-2026-34475

Vulnrichment

Updated: 2026-03-27T20:01:02.764Z

NVD

Status : Received

Published: 2026-03-27T20:16:36.390

Modified: 2026-03-27T20:16:36.390

Link: CVE-2026-34475

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-180

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