CVE-2022-23959
CRITICALCVSS 9.1/10EPSS 1.96%
Last modified
CVE-2022-23959 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. In Varnish Cache before 6.6.2 and 7.x before 7.0.2, Varnish Cache 6.0 LTS before 6.0.10, and and Varnish Enterprise (Cache Plus) 4.1.x before 4.1.11r6 and 6.0.x before 6.0.9r4, request smuggling can occur for HTTP/1 connections.. EPSS estimates a 1.96% chance of exploitation in the next 30 days.
Description
In Varnish Cache before 6.6.2 and 7.x before 7.0.2, Varnish Cache 6.0 LTS before 6.0.10, and and Varnish Enterprise (Cache Plus) 4.1.x before 4.1.11r6 and 6.0.x before 6.0.9r4, request smuggling can occur for HTTP/1 connections.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Varnish-Software | Varnich Cache | >= 1.0.0, < 6.6.2 |
| Varnish-Software | Varnich Cache | >= 4.1.1, < 4.1.11r6 |
| Varnish-Software | Varnich Cache | 4.1 |
| Varnish-Software | Varnish Cache | >= 6.0.0, < 6.0.10 |
| Varnish-Software | Varnish Cache Plus | >= 6.0.0, < 6.0.9r4 |
| Varnish Cache Project | Varnish Cache | >= 7.0.0, < 7.0.2 |
| Fedoraproject | Fedora | 35 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
| Debian | Debian Linux | 11.0 |
References
- https://docs.varnish-software.com/security/VSV00008/Mitigation, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/02/msg00014.htmlMailing List, Third Party Advisory
- https://varnish-cache.org/security/VSV00008.htmlMitigation, Vendor Advisory
- https://www.debian.org/security/2022/dsa-5088Third Party Advisory
- https://docs.varnish-software.com/security/VSV00008/Mitigation, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/02/msg00014.htmlMailing List, Third Party Advisory
- https://varnish-cache.org/security/VSV00008.htmlMitigation, Vendor Advisory
- https://www.debian.org/security/2022/dsa-5088Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2022-23959?
In Varnish Cache before 6.6.2 and 7.x before 7.0.2, Varnish Cache 6.0 LTS before 6.0.10, and and Varnish Enterprise (Cache Plus) 4.1.x before 4.1.11r6 and 6.0.x before 6.0.9r4, request smuggling can occur for HTTP/1 connections.
How severe is CVE-2022-23959?
CVE-2022-23959 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.96% probability of exploitation in the next 30 days.
How do I fix CVE-2022-23959?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
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.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2022-23959?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST