rustsec-2026-0161
Vulnerability from osv_rustsec
Published
2026-06-04 12:00
Modified
2026-06-04 14:53
Summary
`pqcrypto-mlkem` is unmaintained: upstream PQClean project being archived
Details

This crate provides Rust bindings to ML-KEM (FIPS 203) via C implementations from PQClean. The PQClean project is being archived in or after July 2026 (see PQClean/PQClean#604), after which no further security patches or bug fixes will be applied to the upstream implementations.

As a result, this crate will no longer receive updates. Users should migrate to the ml-kem crate, which provides a pure-Rust implementation of ML-KEM (FIPS 203).

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": null,
        "informational": "unmaintained"
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "pqcrypto-mlkem",
        "purl": "pkg:cargo/pqcrypto-mlkem"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "This crate provides Rust bindings to ML-KEM (FIPS 203) via C implementations\nfrom [PQClean](https://github.com/PQClean/PQClean). The PQClean project is\nbeing archived in or after July 2026 (see [PQClean/PQClean#604](https://github.com/PQClean/PQClean/issues/604)),\nafter which no further security patches or bug fixes will be applied to the\nupstream implementations.\n\nAs a result, this crate will no longer receive updates. Users should migrate\nto the [`ml-kem`](https://crates.io/crates/ml-kem) crate, which provides a\npure-Rust implementation of ML-KEM (FIPS 203).",
  "id": "RUSTSEC-2026-0161",
  "modified": "2026-06-04T14:53:59Z",
  "published": "2026-06-04T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/pqcrypto-mlkem"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0161.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/rustpq/pqcrypto/issues/97"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "`pqcrypto-mlkem` is unmaintained: upstream PQClean project being archived"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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