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RUSTSEC-2026-0047 (CVE-2026-3338)

Vulnerability from osv_rustsec – Published: 2026-03-02 12:00 – Updated: 2026-03-21 06:45 – Source website
VLAI
Summary
PKCS7_verify Signature Validation Bypass in AWS-LC
Details

Improper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes.

Customers 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.

There is no workaround; applications using aws-lc-sys should upgrade to the most recent release of aws-lc-sys.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "crypto-failure"
        ],
        "cvss": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "aws-lc-sys",
        "purl": "pkg:cargo/aws-lc-sys"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.24.0"
            },
            {
              "fixed": "0.38.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2026-3338",
    "GHSA-hfpc-8r3f-gw53",
    "GHSA-jchq-39cv-q4wj"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "Improper signature validation in `PKCS7_verify()` in AWS-LC allows an\nunauthenticated user to bypass signature verification when processing PKCS7\nobjects with Authenticated Attributes.\n\nCustomers of AWS services do not need to take action. `aws-lc-sys` contains\ncode from AWS-LC. Applications using `aws-lc-sys` should upgrade to the most\nrecent release of `aws-lc-sys`.\n\nThere is no workaround; applications using `aws-lc-sys` should upgrade to the \nmost recent release of `aws-lc-sys`.",
  "id": "RUSTSEC-2026-0047",
  "modified": "2026-03-21T06:45:35Z",
  "published": "2026-03-02T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/aws-lc-sys"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0047.html"
    },
    {
      "type": "WEB",
      "url": "https://aws.amazon.com/security/security-bulletins/2026-005-AWS"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/aws/aws-lc-rs/security/advisories/GHSA-hfpc-8r3f-gw53"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "PKCS7_verify Signature Validation Bypass in AWS-LC"
}



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