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CVE-2020-10108

25
FAUCET Score

CVE-2020-10108 describes an HTTP request splitting vulnerability in Twisted Web versions up to 19.10.0, impacting products from Canonical, Debian, Fedora, Oracle, and Twisted itself. This critical vulnerability, with a CVSS score of 9.8, allows an unauthenticated attacker to manipulate HTTP requests by providing two Content-Length headers, leading to a pipelined request interpretation and potential compromise of confidentiality, integrity, and availability. Despite its high severity and ease of exploitation (AV:N/AC:L/PR:N), there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 19.10.0CPE matchmatch criteria
cpe:2.3:a:twisted:twisted:*:*:*:*:*:*:*:*
31CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
32CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.97%
Probability of exploitation in next 30 days
EPSS Percentile
89.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0397 is in the 82nd percentile among its peer group of 36,835 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (19)

microsoftpatch availablevia msrc
Product: cm1 python-twisted 20.3.0-1 on CBL Mariner 1.0Fixed in: 20.3.0-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 22.2.0-1
microsoftpatch availablevia msrc
Product: 17003-16820Fixed in: 20.3.0-1
microsoftpatch availablevia msrc
Product: 17004-16823Fixed in: 22.2.0-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 22.2.0-1
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 20.3.0-1
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 20.3.0-1
microsoftpatch availablevia msrc
Product: cbl2 python-twisted 22.2.0-1 on CBL Mariner 2.0Fixed in: 22.2.0-1
oraclepatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: TwistedFixed in: 20.3.0
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: python-twisted-web-0:12.1.0-7.el7_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: python-twisted-web-0:8.2.0-6.el6_10
View patch
redhatend of lifevia redhat_api
Product: Red Hat Satellite 6Fixed in: python-twisted-web
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 10 (Newton)Fixed in: python-twisted
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 13 (Queens)Fixed in: python-twisted
redhatend of lifevia redhat_api
Product: Red Hat Ceph Storage 2Fixed in: calamari-server
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: python-twisted
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 16 (Train)Fixed in: python-twisted
redhatend of lifevia redhat_api
Product: Red Hat Satellite 6Fixed in: python-twisted

Vendor Advisories (4)

microsoft2021-Jul/CVE-2020-10108

CVE-2020-10108

Jul 13, 2021
pipGHSA-h96w-mmrf-2h6vcritical

Improper Input Validation in Twisted

Mar 31, 2020
redhatCVE-2020-10108Important

python-twisted: HTTP request smuggling when presented with two Content-Length headers

Mar 11, 2020
microsoft2020-Mar/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 content-length value was set to zero the request body was interpreted as a pipelined request.

Mar 10, 2020

References

know.bishopfox.com / advisories
ExploitThird Party Advisory
know.bishopfox.com / advisories/twisted-version-19.10.0
Release NotesThird Party Advisory
lists.debian.org / debian-lts-announce/2022/02/msg00021.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/6ISMZFZBWW4EV6ETJGXAYIXN3AT7GBPL
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/YW3NIL7VXSGJND2Q4BSXM3CFTAFU6T7D
security.gentoo.org / glsa/202007-24
Third Party Advisory
usn.ubuntu.com / 4308-1
Third Party Advisory
usn.ubuntu.com / 4308-2
Third Party Advisory
oracle.com / security-alerts/cpuoct2020.html
PatchThird Party Advisory