Vulnerability in Amazon Aws-lc-sys
CVE-2026-3336
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…
Vulnerability class: Improper Certificate Validation
EPSS: 0.008 (51.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Amazon Aws-lc-sys
- Amazon Aws_libcrypto
- Aws Aws-lc — versions 1.41.0
Weakness classification (CWE)
References
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory, Vendor Advisory)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (Release Notes, patch)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (Vendor Advisory, third-party-advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-3336?
- CVE-2026-3336 is a high-severity vulnerability in Amazon Aws-lc-sys, classified under Improper Certificate Validation. CVSS score: 7.5/10. Published 2026-03-02.
- How severe is CVE-2026-3336?
- High severity. CVSS v3 base score is 7.5 out of 10.