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Vulnerability Details :

CVE-2026-4428

Summary
Assigner-AMZN
Assigner Org ID-ff89ba41-3aa1-4d27-914a-91399e9639e5
Published At-19 Mar, 2026 | 20:37
Updated At-25 Mar, 2026 | 14:13
Rejected At-
Credits

CRL Distribution Point Scope Check Logic Error in AWS-LC

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:AMZN
Assigner Org ID:ff89ba41-3aa1-4d27-914a-91399e9639e5
Published At:19 Mar, 2026 | 20:37
Updated At:25 Mar, 2026 | 14:13
Rejected At:
▼CVE Numbering Authority (CNA)
CRL Distribution Point Scope Check Logic Error in AWS-LC

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
Vendor
AWS
Product
AWS-LC
Default Status
unaffected
Versions
Affected
  • From 1.24.0 before 1.71.0 (custom)
Vendor
AWS
Product
AWS-LC-FIPS
Default Status
unaffected
Versions
Affected
  • From 3.0.0 before 3.3.0 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-299CWE-299 Improper check for certificate revocation
Type: CWE
CWE ID: CWE-299
Description: CWE-299 Improper check for certificate revocation
Metrics
VersionBase scoreBase severityVector
3.17.4HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
4.09.1CRITICAL
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
Version: 3.1
Base score: 7.4
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Version: 4.0
Base score: 9.1
Base severity: 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
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-94CAPEC-94 Adversary in the Middle (AiTM)
CAPEC ID: CAPEC-94
Description: CAPEC-94 Adversary in the Middle (AiTM)
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://aws.amazon.com/security/security-bulletins/2026-010-AWS/
vendor-advisory
https://github.com/aws/aws-lc/releases/tag/v1.71.0
patch
Hyperlink: https://aws.amazon.com/security/security-bulletins/2026-010-AWS/
Resource:
vendor-advisory
Hyperlink: https://github.com/aws/aws-lc/releases/tag/v1.71.0
Resource:
patch
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:ff89ba41-3aa1-4d27-914a-91399e9639e5
Published At:19 Mar, 2026 | 21:17
Updated At:20 Mar, 2026 | 13:39

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.09.1CRITICAL
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Secondary3.17.4HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Type: Secondary
Version: 4.0
Base score: 9.1
Base severity: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Secondary
Version: 3.1
Base score: 7.4
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-299Secondaryff89ba41-3aa1-4d27-914a-91399e9639e5
CWE ID: CWE-299
Type: Secondary
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://aws.amazon.com/security/security-bulletins/2026-010-AWS/ff89ba41-3aa1-4d27-914a-91399e9639e5
N/A
https://github.com/aws/aws-lc/releases/tag/v1.71.0ff89ba41-3aa1-4d27-914a-91399e9639e5
N/A
Hyperlink: https://aws.amazon.com/security/security-bulletins/2026-010-AWS/
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
Resource: N/A
Hyperlink: https://github.com/aws/aws-lc/releases/tag/v1.71.0
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
Resource: N/A

Change History

0
Information is not available yet

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