CVE-2020-10109

Name: CVE-2020-10109
Creator: NVD / NIST
Published: 2020-03-12T13:15:12.37+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.30%

Last modified Jun 17, 2026

CVE-2020-10109 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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 precedence and the remainder of the request body was interpreted as a pipelined request.. EPSS estimates a 3.30% chance of exploitation in the next 30 days.

Description

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 precedence and the remainder of the request body was interpreted as a pipelined request.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

3.30%

86.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-444

Affected Software

Vendor	Product	Versions
Twisted	Twisted	<= 19.10.0
Fedoraproject	Fedora	31
Fedoraproject	Fedora	32
Debian	Debian Linux	9.0
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.10

References

https://know.bishopfox.com/advisoriesExploit, Third Party Advisory
https://know.bishopfox.com/advisories/twisted-version-19.10.0Release Notes, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/02/msg00021.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ISMZFZBWW4EV6ETJGXAYIXN3AT7GBPL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YW3NIL7VXSGJND2Q4BSXM3CFTAFU6T7D/
https://security.gentoo.org/glsa/202007-24Third Party Advisory
https://usn.ubuntu.com/4308-1/Third Party Advisory
https://usn.ubuntu.com/4308-2/Third Party Advisory
https://know.bishopfox.com/advisoriesExploit, Third Party Advisory
https://know.bishopfox.com/advisories/twisted-version-19.10.0Release Notes, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/02/msg00021.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ISMZFZBWW4EV6ETJGXAYIXN3AT7GBPL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YW3NIL7VXSGJND2Q4BSXM3CFTAFU6T7D/
https://security.gentoo.org/glsa/202007-24Third Party Advisory
https://usn.ubuntu.com/4308-1/Third Party Advisory
https://usn.ubuntu.com/4308-2/Third Party Advisory

Timeline

Published: Mar 12, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-10109?

How severe is CVE-2020-10109?

CVE-2020-10109 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.30% probability of exploitation in the next 30 days.

How do I fix CVE-2020-10109?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-10109?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST