CVE-2022-29217

Publication date 24 May 2022

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

PyJWT is a Python implementation of RFC 7519. PyJWT supports multiple different JWT signing algorithms. With JWT, an attacker submitting the JWT token can choose the used signing algorithm. The PyJWT library requires that the application chooses what algorithms are supported. The application can specify `jwt.algorithms.get_default_algorithms()` to get support for all algorithms, or specify a single algorithm. The issue is not that big as `algorithms=jwt.algorithms.get_default_algorithms()` has to be used. Users should upgrade to v2.4.0 to receive a patch for this issue. As a workaround, always be explicit with the algorithms that are accepted and expected when decoding.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
pyjwt	22.04 LTS jammy	Fixed 2.3.0-1ubuntu0.1
	21.10 impish	Ignored end of life
	20.04 LTS focal	Fixed 1.7.1-2ubuntu2.1
	18.04 LTS bionic	Fixed 1.5.3+ds1-1ubuntu0.1
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release

Patch details

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

Package	Patch details
pyjwt	Upstream: 9c52867

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	High
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Related Ubuntu Security Notices (USN)

USN-5526-1
PyJWT vulnerability
20 July 2022