CVE-2026-3336
Certificate Validation Bypass in AWS-LC PKCS7_verify Function
Publication date: 2026-03-02
Last updated on: 2026-03-11
Assigner: AMZN
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| amazon | aws_libcrypto | From 1.41.0 (inc) to 1.69.0 (exc) |
| amazon | aws-lc-sys | From 0.24.0 (inc) to 0.38.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-295 | The product does not validate, or incorrectly validates, a certificate. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is an improper certificate validation issue in the PKCS7_verify() function within AWS-LC. It allows an unauthenticated user to bypass the certificate chain verification process when handling PKCS7 objects that have multiple signers, except for the final signer.
How can this vulnerability impact me? :
The vulnerability can lead to a security risk where an attacker can bypass certificate chain verification, potentially allowing them to impersonate or tamper with signed data without detection. This could compromise the integrity of applications relying on AWS-LC for certificate validation.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
Applications using AWS-LC should upgrade to AWS-LC version 1.69.0 to mitigate this vulnerability.
Customers of AWS services do not need to take any action.