CVE-2026-34475 — MEDIUM (5.4)

Q: How severe is CVE-2026-34475?

CVE-2026-34475 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-34475?

Check the references section above for vendor advisories and patch information. Affected products include: Varnish-Software Varnish Enterprise, Vinyl-Cache Vinyl Cache.

Vulnerability 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.

CVSS Score

5.4

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Varnish-Software	Varnish Enterprise	<= 6.0.15
Vinyl-Cache	Vinyl Cache	< 8.0.1

Related Weaknesses (CWE)

CWE-180

References

https://vinyl-cache.org/security/VSV00018.htmlVendor AdvisoryMitigation

FAQ

What is CVE-2026-34475?

CVE-2026-34475 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 auth...

How severe is CVE-2026-34475?

CVE-2026-34475 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-34475?

Check the references section above for vendor advisories and patch information. Affected products include: Varnish-Software Varnish Enterprise, Vinyl-Cache Vinyl Cache.