CVE-2026-4428

CRITICAL

CRL Distribution Point Scope Check Logic Error in AWS-LC

Title source: CVE List
STIX 2.1 vulnerability

Record summary

CVE-2026-4428 has a selected CVSS score of 9.1 (critical).

Description

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.

Description source: CVE List

Exploitation context

CISA SSVC decision

ExploitationNone
AutomatableNo
Technical impactTotal

CISA Coordinator · SSVC 2.0.3 · Evaluated Mar 25, 2026 · Source: CVE List

Affected products and versions

2
ProductSourceVersion range

AWS-LC

Browse AWS / AWS-LC

Default status: unaffected

CVE List1.24.0 to < 1.71.0affected

AWS-LC-FIPS

Browse AWS / AWS-LC-FIPS

Default status: unaffected

CVE List3.0.0 to < 3.3.0affected

References

2