CVE-2026-4428

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.

Score

CVSS 4.0 9.1 Critical

Status

Awaiting Analysis - ff89ba41-3aa1-4d27-914a-91399e9639e5

Published

2026-03-19

Last modified

2026-03-25

Weaknesses

CWE-299

Affected products

• Aws-lc (Aws)
• Aws-lc-fips (Aws)

References

• https://aws.amazon.com/security/security-bulletins/2026-010-AWS/
• https://github.com/aws/aws-lc/releases/tag/v1.71.0