Twisted is a single, widely used Python networking library that underlies numerous web frameworks, servers, and distributed applications, giving its vulnerabilities outsized reach across the software supply chain. The vendor's disclosures skew toward serious outcomes and display a moderate tendency toward public exploit availability, with the recurring weakness pattern centered on HTTP-layer interpretation issues including request smuggling, TLS validation gaps, and web-application flaws such as cross-site scripting and resource exhaustion. Defenders should monitor this vendor's releases closely and ensure downstream applications and frameworks that embed it are kept current, as a single fix may remediate exposure across multiple dependent products; live severity and exploitation figures are shown alongside this summary.
The number and severity of CVEs published that impact products developed by Twisted over time
Signals from CVEs in this vendor scope (13 CVEs).
13 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2026-42304HIGH Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.4.0rc2, the twisted.names module is vulnerable to a Denial of Service (DoS) attac | May 13, 2026 | 7.5 | 30 | NO | NO |
CVE-2020-10109CRITICAL In Twisted Web through 19.10.0, there was an HTTP request splitting vulnerability. When presented with a content-length and a chunked encoding header, the content-length took prece | Mar 12, 2020 | 9.8 | 30 | NO | NO |
CVE-2024-41810MEDIUM Twisted is an event-based framework for internet applications, supporting Python 3.6+. The `twisted.web.util.redirectTo` function contains an HTML injection vulnerability. If appli | Jul 29, 2024 | 6.1 | 28 | NO | YES |
CVE-2022-21716HIGH Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 22.2.0, Twisted SSH client and server implement is able to accept an infinite amount | Mar 3, 2022 | 7.5 | 28 | NO | NO |
CVE-2022-24801HIGH Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to version 22.4.0rc1, the Twisted Web HTTP 1.1 server, located in the `twisted.web.http | Apr 4, 2022 | 8.1 | 27 | NO | NO |
CVE-2022-21712HIGH twisted is an event-driven networking engine written in Python. In affected versions twisted exposes cookies and authorization headers when following cross-origin redirects. This i | Feb 7, 2022 | 7.5 | 25 | NO | NO |
CVE-2020-10108CRITICAL In Twisted Web through 19.10.0, there was an HTTP request splitting vulnerability. When presented with two content-length headers, it ignored the first header. When the second cont | Mar 12, 2020 | 9.8 | 25 | NO | NO |
CVE-2019-12855HIGH In words.protocols.jabber.xmlstream in Twisted through 19.2.1, XMPP support did not verify certificates when used with TLS, allowing an attacker to MITM connections. | Jun 16, 2019 | 7.4 | 24 | NO | NO |
CVE-2019-12387MEDIUM In Twisted before 19.2.1, twisted.web did not validate or sanitize URIs or HTTP methods, allowing an attacker to inject invalid characters such as CRLF. | Jun 10, 2019 | 6.1 | 22 | NO | NO |
CVE-2022-39348MEDIUM 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` | Oct 26, 2022 | 5.4 | 21 | NO | NO |
Signals from CVEs in this vendor scope (13 CVEs).
An overview of all social media posts that mention a CVE ID that affects a product developed by Twisted.
Media articles that mention a CVE ID that affects a product developed by Twisted — matched by CVE ID, not by vendor name.