Amazon AWS-LC up to 1.68.x PKCS7_verify certificate validation

Summaryinfo

A vulnerability was found in Amazon AWS-LC up to 1.68.x. It has been declared as critical. This impacts the function PKCS7_verify. The manipulation results in certificate validation. This vulnerability is reported as CVE-2026-3336. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Amazon AWS-LC up to 1.68.x. It has been classified as problematic. Affected is the function PKCS7_verify. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on integrity. CVE summarizes:

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.

The advisory is available at aws.amazon.com. This vulnerability is traded as CVE-2026-3336 since 02/27/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1587.003 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 300584 (Linux Distros Unpatched Vulnerability : CVE-2026-3336), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.69.0 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (300584). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• Amazon

Name

• AWS-LC

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33
• 1.34
• 1.35
• 1.36
• 1.37
• 1.38
• 1.39
• 1.40
• 1.41
• 1.42
• 1.43
• 1.44
• 1.45
• 1.46
• 1.47
• 1.48
• 1.49
• 1.50
• 1.51
• 1.52
• 1.53
• 1.54
• 1.55
• 1.56
• 1.57
• 1.58
• 1.59
• 1.60
• 1.61
• 1.62
• 1.63
• 1.64
• 1.65
• 1.66
• 1.67
• 1.68

License

• commercial

CPE 2.3info

• 🔒
• 🔒
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CPE 2.2info

• 🔒
• 🔒
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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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