CVE-2024-37568

Publication date 9 June 2024

Last updated 11 July 2025

Ubuntu priority

Cvss 3 Severity Score

Description

lepture Authlib before 1.3.1 has algorithm confusion with asymmetric public keys. Unless an algorithm is specified in a jwt.decode call, HMAC verification is allowed with any asymmetric public key. (This is similar to CVE-2022-29217 and CVE-2024-33663.)

Status

Show unmaintained releases

Package	Ubuntu Release	Status
python-authlib	25.10 questing	Needs evaluation
	25.04 plucky	Ignored end of life, was needs-triage
	24.10 oracular	Ignored end of life, was needs-triage
	24.04 LTS noble	Vulnerable
	23.10 mantic	Ignored end of life, was needed
	22.04 LTS jammy	Vulnerable
	20.04 LTS focal	Not in release

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-8065-1
Authlib vulnerabilities
25 February 2026