CVE-2026-4428
low-risk
Published 2026-03-19
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.
Do I need to act?
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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.4/10
High
NETWORK
/ HIGH complexity
27
/ 100
low-risk
Severity
22/34 · High
Exploitability
0/34 · Minimal
Exposure
5/34 · Minimal