CVE-2026-3338
PKCS7_verify Signature Validation Bypass in AWS-LC
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
Improper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes. 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-347 |
| Vendor | aws |
| Product | aws-lc |
| Published | Mar 2, 2026 |
| Last Updated | Jul 15, 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
References
aws.amazon.com: https://aws.amazon.com/security/security-bulletins/2026-005-AWS/ github.com: https://github.com/aws/aws-lc/releases/tag/v1.69.0 github.com: https://github.com/aws/aws-lc/security/advisories/GHSA-jchq-39cv-q4wj access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-3338 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2444025 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3338.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:5459