CVE-2026-3338 Details
Description
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.
A vulnerability in AWS-LC's PKCS7_verify() function allows an unauthenticated user to bypass signature validation. This issue arises when processing PKCS7 objects that contain Authenticated Attributes. The vulnerability is present in AWS-LC versions 1.41.0 prior to 1.69.0, as well as in aws-lc-sys versions 0.24.0 prior to 0.38.0.
Users of AWS-LC should upgrade to version 1.69.0. For those using aws-lc-sys, the upgrade to version 0.38.0 is recommended.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 3, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2026:5459 | redhat-SADP | |
| https://access.redhat.com/security/cve/CVE-2026-3338 | redhat-SADP | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2444025 | redhat-SADP | |
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3338.json | redhat-SADP | |
| https://aws.amazon.com/security/security-bulletins/2026-005-AWS/ | AMZN | Vendor Advisory |
| https://github.com/aws/aws-lc/releases/tag/v1.69.0 | AMZN | Release Notes |
| https://github.com/aws/aws-lc/security/advisories/GHSA-jchq-39cv-q4wj | AMZN | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-347 | Improper Verification of Cryptographic Signature | redhat-SADP |
| CWE-347 | Improper Verification of Cryptographic Signature | AMZN |
Affected Products
| Product | Versions |
|---|---|
| amazon aws-lc-sys | >= 0.24.0, < 0.38.0 |
CPE
Remediation
| |
| amazon aws libcrypto | >= 1.41.0, < 1.69.0 |
CPE
Remediation
| |
Change History
8 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 15, 2026 | CVE Modified | redhat-SADP |
| Jun 30, 2026 | CVE Modified | redhat-SADP |
| Jun 17, 2026 | CVE Modified | AMZN |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 11, 2026 | Reanalysis | [email protected] |
| Mar 11, 2026 | Initial Analysis | [email protected] |
| Mar 2, 2026 | CVE Modified | AMZN |
| Mar 2, 2026 | New CVE Received | AMZN |