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Vulnerability record · CVE-2022-39348 · published 26 October 2022

CVE-2022-39348: Twisted cross-site scripting vulnerability

Twisted · Twisted

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.

5.4 CVSS 3.1 Medium EPSS 1.2% · top 31.9% CWE-79 · Cross-site scriptingCWE-80 · CWE-80
5.4CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
11References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/twisted/twisted/commit/f2f5e81c03f14e253e85fe457e646130780db40b Patch
https://github.com/twisted/twisted/commit/f49041bb67792506d85aeda9cf6157e92f8048f4 Patch
https://github.com/twisted/twisted/security/advisories/GHSA-vg46-2rrj-3647 ExploitPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00038.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202301-02 Third Party Advisory
https://github.com/twisted/twisted/commit/f2f5e81c03f14e253e85fe457e646130780db40b Patch
https://github.com/twisted/twisted/commit/f49041bb67792506d85aeda9cf6157e92f8048f4 Patch
https://github.com/twisted/twisted/security/advisories/GHSA-vg46-2rrj-3647 ExploitPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00038.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2024/11/msg00028.html
https://security.gentoo.org/glsa/202301-02 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2022-39348), CISA KEV, FIRST EPSS (scores of 2026-09-30). This page is refreshed as NVD updates the record.