Vulnerability · Published Mar 19, 2026 · Assigned by AMZN
CVE-2026-4428CRL Distribution Point Scope Check Logic Error in AWS-LC
High 7.4
In plain English
A high-severity security flaw in AWS-LC from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities).
Severity (CVSS 3.1)7.4High
Exploit odds (30 days)0.3%top 82.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AWS | AWS-LC | 1.24.0 – before 1.71.0 |
| AWS | AWS-LC-FIPS | 3.0.0 – before 3.3.0 |
Weakness: CWE-299 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N