CVE-2026-34475CRITICAL 9.8EPSS p10.1%

CVE-2026-34475CVE-2026-34475

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.20% probability of exploitation · percentile 10.1% · 2026-06-18T12:00:27Z
Published2026-03-27
Last modified2026-04-22

Underlying weaknesses· 1

CWE-180

References

  1. https://vinyl-cache.org/security/VSV00018.html

1

TypeTargetConfidenceTier
WeaknessIncorrect Behavior Order: Validate Before Canonicalizecwe-1800%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.