CVE-2026-3338

HIGH EPSS 48.6%
Published Mar 2, 20263mo ago · Modified Jun 17, 20261w ago
8.7 CVSS 4.0
High
Find Similar
Published Mar 2, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
48.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-347

Affected Products 2

VendorProductVersionRange
amazonaws-lc-sys*≥0.24.0  –  <0.38.0
amazonaws_libcrypto*≥1.41.0  –  <1.69.0

References 3

  • aws.amazon.com https://aws.amazon.com/security/security-bulletins/2026-005-AWS/
    Vendor Advisory
  • github.com https://github.com/aws/aws-lc/releases/tag/v1.69.0
    Release Notes
  • github.com https://github.com/aws/aws-lc/security/advisories/GHSA-jchq-39cv-q4wj
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.