CVE-2022-23959

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.

Category

9.1
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.25%
Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory varnish-software.com Vendor Advisory varnish-cache.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://varnish-cache.org/security/VSV00008.html mitigation vendor advisory
https://docs.varnish-software.com/security/VSV00008/ mitigation vendor advisory
https://lists.debian.org/debian-lts-announce/2022/02/msg00014.html third party advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UMMDMQWNAE3BTSZUHXQHVAMZC5TLHLYT/ vendor advisory
https://www.debian.org/security/2022/dsa-5088 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2022-23959?
CVE-2022-23959 has been scored as a critical severity vulnerability.
How to fix CVE-2022-23959?
To fix CVE-2022-23959, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-23959 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-23959 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.