CVE-2026-3336

High

Description

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductAmazon Aws-lc-sys

PublishedMar 2, 2026

First seenMar 2, 2026

Weakness typeCWE-295CWE-295

How to fix

Update

amazon aws-lc-sys0.38.0 or later
amazon aws_libcrypto1.69.0 or later

Patches

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

Vendor advisories

Affected products

Product	Affected versions	Fixed in
amazon aws-lc-sys	0.24.0 ≤ v < 0.38.0	0.38.0
amazon aws_libcrypto	1.41.0 ≤ v < 1.69.0	1.69.0

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

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