CVE-2026-4428: Aws Aws-Lc

High severity, CVSS 7.4. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Aws Aws-Lc: from 1.24.0, before 1.71.0 (fixed in 1.71.0)
• Aws Aws-Lc-Fips: from 3.0.0, before 3.3.0 (fixed in 3.3.0)

Published 2026-03-19. Last modified 2026-06-17.