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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.

PUBLISHED Reserved 2026-03-27 | Published 2026-03-27 | Updated 2026-03-27 | Assigner mitre




MEDIUM: 5.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Problem types

CWE-180 Incorrect Behavior Order: Validate Before Canonicalize

Product status

Default status
unaffected

Any version before 6.0.17 LTS
affected

7.0.0 (custom) before 8.0.1
affected

References

vinyl-cache.org/security/VSV00018.html

cve.org (CVE-2026-34475)

nvd.nist.gov (CVE-2026-34475)

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