Name: CVE-2026-3338: Improper Verification of Cryptographic Signature
Creator: Rapid7
Published: 2026-03-02T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-3338, CWE-347, CVSS 7.5, EPSS 0.00779

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.

CVSS Details

CVSS 4.0 Base Score: 8.7 (HIGH)
CVSS 4.0 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
CVSS 3.1 Base Score: 7.5
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Amazon Linux Ami 2	—	Upgrade amazon-efs-utils	May 20, 2026	May 20, 2026
Amazon_linux_2023	—	Upgrade mount-s3-debugsourceUpgrade mount-s3Upgrade amazon-efs-utilsUpgrade mount-s3-debuginfo	Apr 7, 2026	Mar 2, 2026
Redhat_linux	—	No solution exists	Jul 17, 2026	Mar 2, 2026

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CVSS Details

Covered by Rapid7

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