Varnish Cache, with HTTP/2 enabled, allows request smuggling and VCL authorization bypass via a large Content-Length header for a POST request. This affects Varnish Enterprise 6.0.x before 6.0.8r3, and Varnish Cache 5.x and 6.x before 6.5.2, 6.6.x before 6.6.1, and 6.0 LTS before 6.0.8.
CVSS Details
- CVSS 3.1 Base Score: 6.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade varnish-develUpgrade varnish-docsUpgrade varnish | May 4, 2022 | Jul 14, 2021 |
| Alpine Linux | — | Upgrade varnish | Mar 26, 2024 | Jul 14, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jul 14, 2021 |
| Centos_linux | — | Upgrade varnish-modules-debugsourceUpgrade varnish-develUpgrade varnish-modulesUpgrade varnishUpgrade varnish-modules-debuginfoUpgrade varnish-docs | Aug 3, 2021 | Jul 14, 2021 |
| Debian | — | Upgrade varnish | Mar 7, 2022 | Jul 14, 2021 |
| Oracle_linux | — | Upgrade varnishUpgrade varnish-modulesUpgrade varnish-docsUpgrade varnish-devel | Aug 4, 2021 | Jul 13, 2021 |
| Redhat_linux | — | Upgrade varnish-modules-debuginfoUpgrade varnish-modulesUpgrade varnish-docsUpgrade varnish-develUpgrade varnish-modules-debugsourceUpgrade varnish | Aug 3, 2021 | Jul 14, 2021 |
| Rocky_linux | — | Upgrade varnish-modulesUpgrade varnish-modules-debugsourceUpgrade varnish-docsUpgrade varnish-develUpgrade varnishUpgrade varnish-modules-debuginfo | Mar 12, 2024 | Jul 14, 2021 |
| Suse | — | Upgrade libvarnishapi3Upgrade varnishUpgrade varnish-devel | Oct 26, 2022 | Jul 14, 2021 |
| Ubuntu | — | Upgrade varnishUpgrade libvarnishapi1Upgrade libvarnishapi2 | Jun 9, 2022 | Jul 14, 2021 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub