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.

Subscriptions

Vendors Products
Aws-lc-sys Subscribe
Aws Libcrypto Subscribe

Tracking

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Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 11 Mar 2026 17:00:00 +0000

Type Values Removed Values Added
First Time appeared Amazon
Amazon aws-lc-sys
Amazon aws Libcrypto
CPEs cpe:2.3:a:aws:aws_libcrypto:*:*:*:*:*:*:*:* cpe:2.3:a:amazon:aws-lc-sys:*:*:*:*:*:rust:*:*
cpe:2.3:a:amazon:aws_libcrypto:*:*:*:*:*:*:*:*
Vendors & Products Aws aws Libcrypto
Amazon
Amazon aws-lc-sys
Amazon aws Libcrypto

Wed, 11 Mar 2026 14:15:00 +0000

Type Values Removed Values Added
First Time appeared Aws aws Libcrypto
CPEs cpe:2.3:a:aws:aws_libcrypto:*:*:*:*:*:*:*:*
Vendors & Products Aws aws Libcrypto

Wed, 04 Mar 2026 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Aws
Aws aws-lc
Vendors & Products Aws
Aws aws-lc

Wed, 04 Mar 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Tue, 03 Mar 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 02 Mar 2026 22:30:00 +0000

Type Values Removed Values Added
References

Mon, 02 Mar 2026 21:45:00 +0000

Type Values Removed Values Added
Description 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.
Title PKCS7_verify Signature Validation Bypass in AWS-LC
Weaknesses CWE-347
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-03-03T14:39:48.768Z

Reserved: 2026-02-27T15:16:29.281Z

Link: CVE-2026-3338

cve-icon Vulnrichment

Updated: 2026-03-03T14:39:43.993Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-02T22:16:32.350

Modified: 2026-03-11T16:54:59.103

Link: CVE-2026-3338

cve-icon Redhat

Severity : Important

Publid Date: 2026-03-02T21:22:41Z

Links: CVE-2026-3338 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-03-03T08:40:54Z

Weaknesses