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CVE-2024-37568

HIGH
7.5
CVSS Score
Published: June 9, 2024 at 12:00 AM UTC
Updated: June 17, 2026 at 07:38 AM UTC
2 products affected across 2 vendorsAuthlibAuthlib

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Severity
HIGH7.5
Exploit prediction
EPSS 0.4%
SSVC
PoC

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.)

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Authlib· Authlib
95%
v < 1.3.1
Affected range stops below 1.3.1, so it looks safe — our inference, not a vendor statement
Authlib· Lepture
60%
v < 1.3.1
Affected range stops below 1.3.1, so it looks safe — our inference, not a vendor statement

References (5)

ExploitIssue Tracking
Source: [email protected]
https://github.com/lepture/authlib/issues/654
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FHJI32SN4FNAUVNALVGOKWHNSQ6XS3M5/
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IZI7HYGN7VZAYFV6UV3SRLYF7QGERXIU/
Source: [email protected]
https://www.vicarius.io/vsociety/posts/algorithm-confusion-in-lepture-authlib-cve-2024-37568
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2025/10/msg00032.html

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-347CWE-284

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