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CRLF injection in urllib3

Moderate severity GitHub Reviewed Published Jun 18, 2021 to the GitHub Advisory Database • Updated Nov 6, 2023

Package

pip urllib3 (pip)

Affected versions

< 1.25.9

Patched versions

1.25.9

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.

References

Published by the National Vulnerability Database Sep 30, 2020
Reviewed Jun 17, 2021
Published to the GitHub Advisory Database Jun 18, 2021
Last updated Nov 6, 2023

Severity

Moderate
6.5
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Weaknesses

CVE ID

CVE-2020-26137

GHSA ID

GHSA-wqvq-5m8c-6g24

Source code

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