CVE-2026-3336 | THREATINT

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.

PUBLISHED Reserved 2026-02-27 | Published 2026-03-02 | Updated 2026-03-02 | Assigner AMZN

HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-295 (Improper Certificate Validation)

Product status

Default status

unaffected

1.41.0 (custom) before 1.69.0

affected

References

aws.amazon.com/security/security-bulletins/2026-005-AWS/ vendor-advisory

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

github.com/...aws-lc/security/advisories/GHSA-cfwj-9wp5-wqvp third-party-advisory

cve.org (CVE-2026-3336)

nvd.nist.gov (CVE-2026-3336)

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