{"id":"CVE-2026-3338","aliases":["GHSA-hfpc-8r3f-gw53","GHSA-jchq-39cv-q4wj","RUSTSEC-2026-0047"],"url":"https://o3.security/vulnerability/CVE-2026-3338","summary":"PKCS7_verify Signature Validation Bypass in AWS-LC","details":"### Summary\nAWS-LC is an open-source, general-purpose cryptographic library.\n\n### Impact\nImproper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes.\n\nCustomers of AWS services do not need to take action. aws-lc-sys contains code from AWS-LC. Applications using aws-lc-sys should upgrade to the most recent release of aws-lc-sys.\n\n#### Impacted versions: \naws-lc-sys versions: >= 0.24.0, < 0.38.0\n\n### Patches\nThe patch is included in v0.38.0\n\n### Workarounds\nThere is no workaround. Applications using aws-lc-sys should upgrade to the most recent release of aws-lc-sys.\n\n### Resources\nIf there are any questions or comments about this advisory, contact [AWS/Amazon] Security via the [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.","published":"2026-03-02T21:22:41.954Z","modified":"2026-08-22T09:15:42.456807Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"aws-lc-sys","fixedVersion":"0.38.0"}],"fix":null,"references":[{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3338.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:5459"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-3338"},{"type":"ADVISORY","url":"https://aws.amazon.com/security/security-bulletins/2026-005-AWS/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3338.json"},{"type":"ADVISORY","url":"https://github.com/aws/aws-lc/security/advisories/GHSA-jchq-39cv-q4wj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3338"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2444025"},{"type":"FIX","url":"https://github.com/aws/aws-lc/releases/tag/v1.69.0"},{"type":"WEB","url":"https://github.com/aws/aws-lc-rs/security/advisories/GHSA-hfpc-8r3f-gw53"},{"type":"WEB","url":"https://aws.amazon.com/security/security-bulletins/2026-005-AWS"},{"type":"PACKAGE","url":"https://github.com/aws/aws-lc-rs"},{"type":"WEB","url":"https://rustsec.org/advisories/RUSTSEC-2026-0047.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-22T09:15:42.456807Z"}}