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CVE-2026-4428 Detail

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  AMZN
CVSS-B 9.1 CRITICAL
Vector:  CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://aws.amazon.com/security/security-bulletins/2026-010-AWS/ AMZN
https://github.com/aws/aws-lc/releases/tag/v1.71.0 AMZN

Weakness Enumeration

CWE-ID CWE Name Source
CWE-299 Improper Check for Certificate Revocation AMZN  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-4428
NVD Published Date:
03/19/2026
NVD Last Modified:
03/20/2026
Source:
AMZN