CVE-2026-3336 Details
Description
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.
A vulnerability in AWS-LC's PKCS7_verify() function allows an unauthenticated user to bypass certificate chain verification. This issue arises when processing PKCS7 objects with multiple signers, excluding the final signer. 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-2026-3336 | redhat-SADP | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2444026 | redhat-SADP | |
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3336.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-cfwj-9wp5-wqvp | AMZN | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-295 | Improper Certificate Validation | redhat-SADP |
| CWE-295 | Improper Certificate Validation | 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 9, 2026 | Initial Analysis | [email protected] |
| Mar 2, 2026 | CVE Modified | AMZN |
| Mar 2, 2026 | New CVE Received | AMZN |