CVE-2026-3338 HIGH

CVE-2026-3338: PKCS7_verify Signature Validation Bypass in AWS-LC

Vendor Aws
Product AWS-LC
Weakness CWE-347
Published March 2, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 2, 2026 CVE published
June 30, 2026 Record updated