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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.

PUBLISHED Reserved 2026-03-19 | Published 2026-03-19 | Updated 2026-03-25 | Assigner AMZN




HIGH: 7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CRITICAL: 9.1CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-299 Improper check for certificate revocation

Product status

Default status
unaffected

1.24.0 (custom) before 1.71.0
affected

Default status
unaffected

3.0.0 (custom) before 3.3.0
affected

References

aws.amazon.com/security/security-bulletins/2026-010-AWS/ vendor-advisory

github.com/aws/aws-lc/releases/tag/v1.71.0 patch

cve.org (CVE-2026-4428)

nvd.nist.gov (CVE-2026-4428)

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