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CVE-2026-34475

nvd nist
Published: Mar 27, 2026Modified: Jun 17, 2026

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9.8
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability: 3.9 / Impact: 5.9
Source: NVD

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.

Affected (13)

Varnish Software
1 product
Varnish Enterprise
Vinyl Cache
1 product
Vinyl Cache
Configuration A
12 vulnerable
Vulnerable SoftwareAffected Versions
Varnish Software
Varnish Enterprise
Up to 6.0.15
Varnish Enterprise
Version 6.0.16 r10
Varnish Enterprise
Version 6.0.16 r11
Varnish Enterprise
Version 6.0.16 r1
Varnish Enterprise
Version 6.0.16 r2
Varnish Enterprise
Version 6.0.16 r3
Varnish Enterprise
Version 6.0.16 r4
Varnish Enterprise
Version 6.0.16 r5
Varnish Enterprise
Version 6.0.16 r6
Varnish Enterprise
Version 6.0.16 r7
Varnish Enterprise
Version 6.0.16 r8
Varnish Enterprise
Version 6.0.16 r9
Configuration B
1 vulnerable
Vulnerable SoftwareAffected Versions
Vinyl Cache
Before 8.0.1

Related CWEs

CWE-180
Incorrect Behavior Order: Validate Before Canonicalize
The product validates input before it is canonicalized, which prevents the product from detecting data that becomes invalid after the canonicalization step.

References (1)

Source: cve@mitre.org
MitigationVendor Advisory

Timeline

No history available yet.