# CVE-2026-3336: PKCS7_verify Certificate Chain Validation Bypass in AWS-LC

> CVE-2026-3336: PKCS7_verify Certificate Chain Validation Bypass in AWS-LC. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-3336
Last updated: 2026-08-21T12:13:00Z

- Published: 2026-03-02 21:15 UTC · Updated: 2026-08-21 12:13 UTC · Assigner: AMZN
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS: 0.78%, 56th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-295

## 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.

## Affected vendors and products

- AWS: AWS-LC
- Red Hat: Confidential Compute Attestation
- Red Hat: Red Hat Enterprise Linux 10
- Red Hat: Red Hat Enterprise Linux 9
- Red Hat: Red Hat OpenShift Container Platform 4
- Red Hat: Red Hat OpenShift Update Service
- Red Hat: Red Hat Trusted Artifact Signer 1.3
- Red Hat: Red Hat Trusted Profile Analyzer

## Tracked companies

- [Amazon Web Services](https://rewindex.com/company/aws.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-3336)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-3336)
- [https://aws.amazon.com/security/security-bulletins/2026-005-AWS/](https://aws.amazon.com/security/security-bulletins/2026-005-AWS/)
- [https://github.com/aws/aws-lc/releases/tag/v1.69.0](https://github.com/aws/aws-lc/releases/tag/v1.69.0)
- [https://github.com/aws/aws-lc/security/advisories/GHSA-cfwj-9wp5-wqvp](https://github.com/aws/aws-lc/security/advisories/GHSA-cfwj-9wp5-wqvp)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-3336 · Markdown: https://rewindex.com/cve/CVE-2026-3336.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-3336 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T04:04:00.613Z