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VULNERABILITIES

CVE-2020-26137 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://bugs.python.org/issue39603 CVEIssue TrackingVendor Advisory
https://github.com/urllib3/urllib3/commit/1dd69c5c5982fae7c87a620d487c2ebf7a6b436b CVEPatchThird Party Advisory
https://github.com/urllib3/urllib3/pull/1800 CVEPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00015.html CVEMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00012.html CVE

see all 16 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')[email protected]

Affected Products

ProductVersions
python urllib3
< 1.25.9

CPE

  • cpe:2.3:a:python:urllib3:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
canonical ubuntu linux
16.04
18.04
20.04

CPE

  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
  • cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*

Remediation

  • No remediation found in references.
debian debian linux
9.0

CPE

  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
oracle communications cloud native core network function cloud native environment
22.2.0

CPE

  • cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:22.2.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
oracle zfs storage appliance kit
8.8

CPE

  • cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

11 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2020-26137
NVD Published Date:
Sep 30, 2020
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]