What’s Vulnerable › Vulnerabilities
CVE-2022-39348: Twisted vulnerable to NameVirtualHost Host header injection
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.6% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2022-10-26 · updated 2026-06-17
- Weakness: CWE-79
Description
Twisted is an event-based framework for internet applications. Started with version 0.9.4, when the host header does not match a configured host `twisted.web.vhost.NameVirtualHost` will return a `NoResource` resource which renders the Host header unescaped into the 404 response allowing HTML and script injection. In practice this should be very difficult to exploit as being able to modify the Host header of a normal HTTP request implies that one is already in a privileged position. This issue was fixed in version 22.10.0rc1. There are no known workarounds.
Affected products
- Debian Linux: 10.0
- twisted: from 0.9.4 before 22.10.0 — fixed in 22.10.0
How to fix
Upgrade to a fixed version: twisted 22.10.0. Check the vendor advisory for mitigations.
References
- https://github.com/twisted/twisted/commit/f2f5e81c03f14e253e85fe457e646130780db40b
- https://github.com/twisted/twisted/commit/f49041bb67792506d85aeda9cf6157e92f8048f4
- https://github.com/twisted/twisted/security/advisories/GHSA-vg46-2rrj-3647
- https://lists.debian.org/debian-lts-announce/2022/11/msg00038.html
- https://security.gentoo.org/glsa/202301-02
- https://github.com/twisted/twisted/commit/f2f5e81c03f14e253e85fe457e646130780db40b
- https://github.com/twisted/twisted/commit/f49041bb67792506d85aeda9cf6157e92f8048f4
- https://github.com/twisted/twisted/security/advisories/GHSA-vg46-2rrj-3647
- https://lists.debian.org/debian-lts-announce/2022/11/msg00038.html
- https://lists.debian.org/debian-lts-announce/2024/11/msg00028.html
- https://security.gentoo.org/glsa/202301-02
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