{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "libcrux_sha3::portable::incremental::Shake128Xof::squeeze",
            "libcrux_sha3::portable::incremental::Shake256Xof::squeeze"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "libcrux-sha3",
        "purl": "pkg:cargo/libcrux-sha3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.0.10"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The incremental squeeze functions in the portable SHAKE XOF API, when\nattempting to squeeze an output using multiple calls to `squeeze`,\nrather than squeezing the full output at once, could output incorrect\nvalues. Internally, output blocks that were not completely squeezed\nwere not buffered for the next call to `squeeze`, which would\nconsequently drop bytes of the correct squeeze output if the preceding\ncall requested an output of length in bytes not cleanly divisible by\n`RATE` (168 for SHAKE128, 136 for SHAKE256).\n\n## Impact\nThis bug impacts users that rely on this XOF API to squeeze output in\nmultiple calls where any of the calls request an output length that is\nnot divisible by `RATE`. It does not impact the use of libcrux-sha3 in\nlibcrux-ml-kem or libcrux-ml-dsa.\n\n## Mitigation\nStarting from version `0.0.10` the squeeze functions correctly output\nall squeezed bytes independent of the number of `squeeze` calls and\nthe output lengths requested in each call.",
  "id": "RUSTSEC-2026-0207",
  "modified": "2026-07-17T11:34:24Z",
  "published": "2026-04-22T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/libcrux-sha3"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0207.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/celabshq/libcrux/pull/1389"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Incorrect Output of Incremental Portable SHAKE API on Multiple Squeeze Calls"
}