CVE-2026-3338

EUVD-2026-9266
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 51%
Affected Products (NVD)
VendorProductVersion
amazonaws-lc-sys
0.24.0 ≤
𝑥
< 0.38.0
amazonaws_libcrypto
1.41.0 ≤
𝑥
< 1.69.0
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
Red HatRed Hat Trusted Artifact Signer 1.3
1773307309 ≤
𝑥
< *
ADP
Red HatRed Hat Trusted Artifact Signer 1.3
1773307309 ≤
𝑥
< *
ADP
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
amazon-efs-utils
Amazon Linux 2
0:3.0.0-4.amzn2
fixed
Amazon Linux 2023
0:3.0.0-4.amzn2023
fixed
mount-s3
Amazon Linux 2023
0:1.22.2-1.amzn2023
fixed
mount-s3-debuginfo
Amazon Linux 2023
0:1.22.2-1.amzn2023
fixed
mount-s3-debugsource
Amazon Linux 2023
0:1.22.2-1.amzn2023
fixed
Common Weakness Enumeration
References
https://aws.amazon.com/security/security-bulletins/2026-005-AWS/
https://github.com/aws/aws-lc/releases/tag/v1.69.0
https://github.com/aws/aws-lc/security/advisories/GHSA-jchq-39cv-q4wj
https://access.redhat.com/errata/RHSA-2026:5459
https://access.redhat.com/security/cve/CVE-2026-3338
https://bugzilla.redhat.com/show_bug.cgi?id=2444025
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3338.json