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PKCS7_verify Signature Validation Bypass in AWS-LC

CVSS 3.1 7.5 HIGHCVSS 4.0 8.7 HIGHCheck source for fixed versionsKEV status unknown

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-3338

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-3338

Published

AWS-LC

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "defaultStatus": "unaffected",
                    "product": "AWS-LC",
                    "vendor": "AWS",
                    "versions": [
                        {
                            "lessThan": "1.69.0",
                            "status": "affected",
                            "version": "1.41.0",
                            "versionType": "custom"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

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Sources read 15 Nov 22:09 UTC · 274 of 275 readable · 268 fully read · documentation 469/469 current