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.

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CVSS v3.1

5.4 MEDIUM

EPSS

0.20%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

CVSS v3.1 Detail

Attack VectorNETWORK

Attack ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

ScopeCHANGED

ConfidentialityLOW

IntegrityLOW

AvailabilityNONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Connections

3 relationships

CWE-180

source

Timeline

disclosure → media coverage

Mar 27, 2026

Disclosure — published as a CVE record. · last revised by NVD Apr 22, 2026

Public PoC (1)

github.com/bitbcybr/way2poc_cve-2026-34475

Unverified third-party code — review before executing.