CVE-2026-3336

Improper certificate validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass certificate chain verification when processing PKCS7 objects with multiple signers, except the final signer. Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://aws.amazon.com/security/security-bulletins/2026-005-AWS/	Vendor Advisory
https://github.com/aws/aws-lc/releases/tag/v1.69.0	Release Notes
https://github.com/aws/aws-lc/security/advisories/GHSA-cfwj-9wp5-wqvp	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:amazon:aws-lc-sys::::::rust::*
	cpe:2.3:a:amazon:aws_libcrypto::::::::

History

No history.

Information

Published : 2026-03-02 22:16

Updated : 2026-03-11 17:16

NVD link : CVE-2026-3336

Mitre link : CVE-2026-3336

CVE.ORG link : CVE-2026-3336

JSON object : View

Products Affected

amazon

aws_libcrypto
aws-lc-sys

CWE

CWE-295

Improper Certificate Validation

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