CVE-2026-3338

high

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.

References

https://aws.amazon.com/security/security-bulletins/2026-005-AWS/

https://aws.amazon.com/security/security-bulletins/rss/2026-005-aws/

https://github.com/aws/aws-lc/security/advisories/GHSA-jchq-39cv-q4wj

https://github.com/aws/aws-lc/releases/tag/v1.69.0

Details

Source: Mitre, NVD

Published: 2026-03-02

Updated: 2026-03-03

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N

Severity: High

CVSS v3

Base Score: 7.5

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

Severity: High

CVSS v4

Base 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

Severity: High

EPSS

EPSS: 0.00029