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.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

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'}


Projects

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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 : Received

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

Modified: 2026-03-02T23:16:31.373

Link: CVE-2026-3336

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses