{"cve":"CVE-2026-3336","nvd":{"published":"2026-03-02T22:16:31.277","modified":"2026-07-15T02:20:59.523","status":"Modified","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.\n\nCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","score":8.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-295"],"references":["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/security/advisories/GHSA-cfwj-9wp5-wqvp","https://access.redhat.com/errata/RHSA-2026:5459","https://access.redhat.com/security/cve/CVE-2026-3336"],"products":["amazon:aws-lc-sys","amazon:aws_libcrypto"],"source":"nvd","synced_at":"2026-10-19T22:24:17.937441719+00:00"},"epss":{"cve":"CVE-2026-3336","score":0.00744,"percentile":0.54769,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-vw5v-4f2q-w9xf","url":"https://osv.dev/vulnerability/GHSA-vw5v-4f2q-w9xf","summary":"AWS-LC has PKCS7_verify Certificate Chain Validation Bypass","modified":"2026-09-10T03:50:41.273606184Z","packages":[{"ecosystem":"crates.io","name":"aws-lc-sys","purl":"pkg:cargo/aws-lc-sys","ranges":[">=0.24.0 <0.38.0"],"fixed":["0.38.0"]}]},{"id":"RUSTSEC-2026-0046","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0046","summary":"PKCS7_verify Certificate Chain Validation Bypass in AWS-LC","modified":"2026-03-21T06:45:35Z","packages":[{"ecosystem":"crates.io","name":"aws-lc-sys","purl":"pkg:cargo/aws-lc-sys","ranges":[">=0.24.0 <0.38.0"],"fixed":["0.38.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}