CVE-2026-3336
PKCS7_verify Certificate Chain Validation Bypass in AWS-LC
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
Improper certificate validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass certificate chain verification when processing PKCS7 objects with multiple signers, except the final signer. Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.
| CWE | CWE-295 |
| Vendor | aws |
| Product | aws-lc |
| Published | Mar 2, 2026 |
| Last Updated | Mar 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
AWS / AWS-LC
1.41.0 < 1.69.0