HOMEVULNERABILITIESCVE-2020-10109
CRITICAL

CVE-2020-10109

CWE-444Published: March 12, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2020-10109 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
twisted1 product(s)
twisted
Source: NVD CPE · 8 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://know.bishopfox.com/advisories
ADVISORYhttps://know.bishopfox.com/advisories/twisted-version-19.10.0
ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/02/msg00021.html
ADVISORYhttps://security.gentoo.org/glsa/202007-24
ADVISORYhttps://usn.ubuntu.com/4308-1/
ADVISORYhttps://usn.ubuntu.com/4308-2/
ADVISORYhttps://know.bishopfox.com/advisories
ADVISORYhttps://know.bishopfox.com/advisories/twisted-version-19.10.0
ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/02/msg00021.html
ADVISORYhttps://security.gentoo.org/glsa/202007-24
ADVISORYhttps://usn.ubuntu.com/4308-1/
ADVISORYhttps://usn.ubuntu.com/4308-2/

All References (16)

→
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

Quick Facts

CVE IDCVE-2020-10109
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-444
CISA KEVNo
Affected4 vendor(s)
PublishedMar 12, 2020

Related CVEs (CWE-444)

CVE-2018-3907
10.0
CVE-2025-1867
10.0
CVE-2025-55315
9.9
CVE-2020-7611
9.8
CVE-2019-17559
9.8
CVE-2020-10108
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-10109 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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