CVE-2026-3338

HIGH

AWS-LC <1.69.0 - Auth Bypass

Title source: llm
STIX 2.1

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.

Scores

CVSS v3 7.5
EPSS 0.0001
EPSS Percentile 2.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-347
Status published
Products (2)
amazon/aws-lc-sys 0.24.0 - 0.38.0
amazon/aws_libcrypto 1.41.0 - 1.69.0
Published Mar 02, 2026
Tracked Since Mar 03, 2026