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CVE-2020-26137

nvd nist
Published: Sep 30, 2020Modified: Jun 17, 2026

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6.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Exploitability: 3.9 / Impact: 2.5
Source: NVD

Description

urllib3 before 1.25.9 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 putrequest(). NOTE: this is similar to CVE-2020-26116.

Affected (7)

Products: Python: Urllib3 · Canonical: Ubuntu Linux · Debian: Debian Linux · +1 more
Show all products
Python: Urllib3 · Canonical: Ubuntu Linux · Debian: Debian Linux · Oracle: Communications Cloud Native Core Network Function Cloud Native Environment, Zfs Storage Appliance Kit
Python
1 product
Urllib3
Canonical
1 product
Ubuntu Linux
Debian
1 product
Debian Linux
Oracle
2 products
Communications Cloud Native Core Network Function Cloud Native Environment
Zfs Storage Appliance Kit
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Urllib3
Before 1.25.9
Configuration B
3 vulnerable
Vulnerable SoftwareAffected Versions
Canonical
Ubuntu Linux
Version 16.04
Ubuntu Linux
Version 18.04
Ubuntu Linux
Version 20.04
Configuration C
1 vulnerable
Vulnerable SoftwareAffected Versions
Debian Linux
Version 9.0
Configuration D
2 vulnerable
Vulnerable SoftwareAffected Versions
Communications Cloud Native Core Network Function Cloud Native Environment
Version 22.2.0
Zfs Storage Appliance Kit
Version 8.8

Related CWEs

CWE-74
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

References (16)

Source: cve@mitre.org
Issue TrackingVendor Advisory
Source: cve@mitre.org
PatchThird Party Advisory
Source: cve@mitre.org
PatchThird Party Advisory
Source: cve@mitre.org
Mailing ListThird Party Advisory
Source: cve@mitre.org
Source: cve@mitre.org
Third Party Advisory
Source: cve@mitre.org
PatchThird Party Advisory
Source: cve@mitre.org
PatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Issue TrackingVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchThird Party Advisory

Timeline

No history available yet.