CVE-2024-37568

Publication date 9 June 2024

Last updated 27 February 2026

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	Vulnerable
	25.04 plucky	Ignored end of life, was needs-triage
	24.10 oracular	Ignored end of life, was needs-triage
	24.04 LTS noble	Fixed 1.3.0-1ubuntu0.1~esm1
	23.10 mantic	Ignored end of life, was needed
	22.04 LTS jammy	Fixed 0.15.5-1ubuntu0.1~esm1
	20.04 LTS focal	Not in release

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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