CVE-2022-36087

Publication date 9 September 2022

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. In OAuthLib versions 3.1.1 until 3.2.1, an attacker providing malicious redirect uri can cause denial of service. An attacker can also leverage usage of `uri_validate` functions depending where it is used. OAuthLib applications using OAuth2.0 provider support or use directly `uri_validate` are affected by this issue. Version 3.2.1 contains a patch. There are no known workarounds.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
python-oauthlib	22.10 kinetic	Fixed 3.2.0-1ubuntu1
	22.04 LTS jammy	Fixed 3.2.0-1ubuntu0.1
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Ignored end of standard support

Notes

mdeslaur

issue introduced in 3.1.1

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
python-oauthlib	Upstream: 5d85c61 Upstream: e514826

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-5632-1
OAuthLib vulnerability
22 September 2022