CVE-2026-3336

HIGHNVD 7.5
7.5

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.

CVSS v3
7.5
EG Score
—
EPSS
—
KEV
Not listed

Published

March 2, 2026

Last Modified

March 11, 2026

References (3)

Frequently asked(4)

What is CVE-2026-3336?
CVE-2026-3336 is a high vulnerability published on March 2, 2026. 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…
When was CVE-2026-3336 disclosed?
CVE-2026-3336 was first published in the National Vulnerability Database on March 2, 2026, with the most recent update on March 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-3336?
CVE-2026-3336 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-3336?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-3336, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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