CVE-2026-34475
Last modified
CVE-2026-34475 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.20% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Varnish-Software | Varnish Enterprise | <= 6.0.15 | — |
| Varnish-Software | Varnish Enterprise | 6.0.16 | R1 |
| Vinyl-Cache | Vinyl Cache | < 8.0.1 | — |
References
- https://vinyl-cache.org/security/VSV00018.htmlMitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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