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.
History

Wed, 04 Mar 2026 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Aws
Aws aws-lc
Vendors & Products Aws
Aws aws-lc

Wed, 04 Mar 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Tue, 03 Mar 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 02 Mar 2026 22:30:00 +0000

Type Values Removed Values Added
References

Mon, 02 Mar 2026 21:45:00 +0000

Type Values Removed Values Added
References

Mon, 02 Mar 2026 21:30:00 +0000

Type Values Removed Values Added
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.
Title PKCS7_verify Certificate Chain Validation Bypass in AWS-LC
Weaknesses CWE-295
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-03-03T20:05:26.157Z

Reserved: 2026-02-27T15:16:27.359Z

Link: CVE-2026-3336

cve-icon Vulnrichment

Updated: 2026-03-03T20:05:23.006Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-02T22:16:31.277

Modified: 2026-03-03T21:52:29.877

Link: CVE-2026-3336

cve-icon Redhat

Severity : Important

Publid Date: 2026-03-02T21:15:16Z

Links: CVE-2026-3336 - Bugzilla