CVE-2026-4428 HIGH

CVE-2026-4428: CRL Distribution Point Scope Check Logic Error in AWS-LC

Vendor Aws
Product AWS-LC
Weakness CWE-299
Published March 19, 2026
Last update March 25, 2026
View on NVD All CVEs

CVSS base score

7.4/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

What the vulnerability does

01Description

A logic error in CRL distribution point validation in AWS-LC before 1.71.0 causes partitioned CRLs to be incorrectly rejected as out of scope, which allows a revoked certificate to bypass certificate revocation checks. To remediate this issue, users should upgrade to AWS-LC 1.71.0 or AWS-LC-FIPS-3.3.0.

Key dates

02Disclosure timeline

March 19, 2026 CVE published
March 25, 2026 Record updated