CVE-2026-34475CWE-180

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…

Medium · published March 27, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
31.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00382 · 31.1th percentile
Weakness
CWE-180 · Incorrect Behavior Order: Validate Before Canonicalize
Published
2026-03-27T19:40Z
EPSS history
Timeline
  • 27 MAR 19:40Z
    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…
    cvelistv5