Is CVE-2026-34475 actively exploited?

CVE-2026-34475 has no public evidence of in-the-wild exploitation as of 2026-04-22.

What is the CVSS score for CVE-2026-34475?

CVE-2026-34475 has a CVSS score of 5.4 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N.

How do I patch CVE-2026-34475?

Patch guidance is available from varnish-software security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-34475.

CVE-2026-34475 - remediation guidance & executive summary

Q: Which products are affected by CVE-2026-34475?

13 products: varnish-software varnish enterprise, varnish-software varnish enterprise, varnish-software varnish enterprise, varnish-software varnish enterprise, varnish-software varnish enterprise, and 8 more.

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack Vector: network
Complexity: high
Privileges: none
User Action: none
Scope: changed
Confidentiality: low
Integrity: low
Availability: none
Weaknesses: CWE-180

Metadata

Primary Vendor: VARNISH-SOFTWARE
Published: 3/27/2026
Last Modified: 4/22/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

varnish-software : varnish_enterprisevarnish-software : varnish_enterprisevarnish-software : varnish_enterprisevarnish-software : varnish_enterprisevarnish-software : varnish_enterprisevarnish-software : varnish_enterprisevarnish-software : varnish_enterprisevarnish-software : varnish_enterprisevarnish-software : varnish_enterprisevarnish-software : varnish_enterprisevarnish-software : varnish_enterprisevarnish-software : varnish_enterprisevinyl-cache : vinyl_cache

Remediation Guidance

Executive Summary

View on NIST NVD