CVE-2026-3336PKCS7_verify Certificate Chain Validation Bypass in AWS-LC
Updated under an hour ago ()
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It affects AWS-LC and 8 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weakness (CWE)
- CWE-295
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- AMZN
- NVD analysis
- Modified
- Record last updated
- Aug 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
AWS AWS-LC aws:lc (from the name) | from 1.41.0 before 1.69.0 | CNA record |
Red Hat Red Hat Trusted Artifact Signer 1.3 redhat:trusted_artifact_signer | from 1773307309 not affected | CISA ADP |
Red Hat Confidential Compute Attestation redhat:confidential_compute_attestation | 1 | CISA ADP |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | 10 | CISA ADP |
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift | 4 | CISA ADP |
Red Hat Red Hat OpenShift Update Service redhat:openshift_update_service | 5 | CISA ADP |
Red Hat Red Hat Trusted Profile Analyzer redhat:trusted_profile_analyzer | 2 | CISA ADP |
amazon aws-lc-sys amazon:aws-lc-sys | from 0.24.0 before 0.38.0 | NVD |
amazon aws_libcrypto amazon:aws_libcrypto | from 1.41.0 before 1.69.0 | NVD |
References
- https://aws.amazon.com/security/security-bulletins/2026-005-AWS/vendor-advisory
- https://github.com/aws/aws-lc/releases/tag/v1.69.0patch, release-notes
- https://github.com/aws/aws-lc/security/advisories/GHSA-cfwj-9wp5-wqvpthird-party-advisory, vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:5459
- https://access.redhat.com/security/cve/CVE-2026-3336
- https://bugzilla.redhat.com/show_bug.cgi?id=2444026
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3336.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.