CVE-2020-26116

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Summary

CVECVE-2020-26116
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-09-27 04:15:11 UTC
Updated2026-10-08 21:17:26 UTC
Descriptionhttp.client in Python 3.x before 3.5.10, 3.6.x before 3.6.12, 3.7.x before 3.7.9, and 3.8.x before 3.8.5 allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of HTTPConnection.request.

Risk And Classification

Primary CVSS: v3.1 7.2 HIGH from [email protected]

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

Problem Types: CWE-74 | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
2.0[email protected]Primary6.4AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None

AV:N/AC:L/Au:N/C:P/I:P/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Python Python All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
[SECURITY] Fedora 32 Update: python34-3.4.10-11.fc32 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
Oracle Critical Patch Update Advisory - October 2021 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
CVE-2020-26116 Python Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
[SECURITY] Fedora 31 Update: python2-2.7.18-6.fc31 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
Python: Multiple vulnerabilities (GLSA 202101-18) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
[SECURITY] [DLA 2456-1] python3.5 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
[SECURITY] Fedora 33 Update: python2.7-2.7.18-6.fc33 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
USN-4581-1: Python vulnerability | Ubuntu security notices | Ubuntu af854a3a-2127-422b-91ae-364da2661108 usn.ubuntu.com Third Party Advisory
[SECURITY] Fedora 32 Update: python27-2.7.18-6.fc32 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
http.client: HTTP Header Injection in the HTTP method — Python Security 0.0 documentation af854a3a-2127-422b-91ae-364da2661108 python-security.readthedocs.io Patch, Third Party Advisory
[security-announce] openSUSE-SU-2020:1859-1: moderate: Security update f af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
Issue 39603: [security] http.client: HTTP Header Injection in the HTTP method - Python tracker af854a3a-2127-422b-91ae-364da2661108 bugs.python.org Exploit, Issue Tracking, Patch, Vendor Advisory
[SECURITY] [DLA 3432-1] python2.7 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
[SECURITY] Fedora 32 Update: mingw-python3-3.8.3-7.fc32 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 33 Update: python2.7-2.7.18-6.fc33 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 32 Update: python27-2.7.18-6.fc32 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 32 Update: python34-3.4.10-11.fc32 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 32 Update: mingw-python3-3.8.3-7.fc32 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 31 Update: python2-2.7.18-6.fc31 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159200 Oracle Enterprise Linux Security Update for python3 (ELSA-2021-1633)
  • 159342 Oracle Enterprise Linux Security Update for python27:2.7 (ELSA-2021-1761)
  • 159460 Oracle Enterprise Linux Security Update for python38:3.8 (ELSA-2021-1879)
  • 159958 Oracle Enterprise Linux Security Update for python (ELSA-2022-5235)
  • 174590 SUSE Enterprise Linux Security Update for python-urllib3 (SUSE-SU-2021:0299-1)
  • 181802 Debian Security Update for python2.7 (DLA 3432-1)
  • 198293 Ubuntu Security Notification for Python2.7, Python3.7, Python3.8 Vulnerabilities (USN-4754-3)
  • 239292 Red Hat Update for python38:3.8 (RHSA-2021:1879)
  • 239307 Red Hat Update for python27:2.7 (RHSA-2021:1761)
  • 239323 Red Hat Update for python3 (RHSA-2021:1633)
  • 239596 Red Hat Update for python3 (RHSA-2021:3366)
  • 240523 Red Hat Update for python (RHSA-2022:5235)
  • 257179 CentOS Security Update for python (CESA-2022:5235)
  • 296059 Oracle Solaris 11.4 Support Repository Update (SRU) 36.0.1.101.2 Missing (CPUJUL2021)
  • 296070 Oracle Solaris 11.4 Support Repository Update (SRU) 28.82.3 Missing (CPUOCT2020)
  • 352287 Amazon Linux Security Update for python27: AL2012-2020-327
  • 352384 Amazon Linux Security Advisory for python3: ALAS2-2021-1670
  • 352385 Amazon Linux Security Advisory for python: ALAS2-2021-1669
  • 356421 Amazon Linux Security Advisory for python3 : ALAS2-2023-2317
  • 376090 IBM Cognos Analytics Multiple Vulnerabilities (6491661)
  • 377245 Alibaba Cloud Linux Security Update for python (ALINUX2-SA-2022:0032)
  • 377387 Alibaba Cloud Linux Security Update for python3 (ALINUX3-SA-2021:0080)
  • 377557 Alibaba Cloud Linux Security Update for python27:2.7 (ALINUX3-SA-2022:0112)
  • 6000046 Debian Security Update for python-urllib3 (DLA 3610-1)
  • 670783 EulerOS Security Update for python-urllib3 (EulerOS-SA-2021-2541)
  • 670807 EulerOS Security Update for python-urllib3 (EulerOS-SA-2021-2565)
  • 670848 EulerOS Security Update for python3 (EulerOS-SA-2020-2419)
  • 750463 OpenSUSE Security Update for python3 (openSUSE-SU-2020:2333-1)
  • 750464 OpenSUSE Security Update for python3 (openSUSE-SU-2020:2332-1)
  • 750581 OpenSUSE Security Update for python (openSUSE-SU-2020:1988-1)
  • 900127 CBL-Mariner Linux Security Update for python3 3.7.7
  • 902956 Common Base Linux Mariner (CBL-Mariner) Security Update for python3 (3520)
  • 940187 AlmaLinux Security Update for python3 (ALSA-2021:1633)
  • 940287 AlmaLinux Security Update for python38:3.8 (ALSA-2021:1879)
  • 940311 AlmaLinux Security Update for python27:2.7 (ALSA-2021:1761)
  • 960385 Rocky Linux Security Update for python38:3.8 (RLSA-2021:1879)
  • 960420 Rocky Linux Security Update for python27:2.7 (RLSA-2021:1761)

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