GHSA-PV9V-5J35-XWCR

Vulnerability from github – Published: 2026-03-26 18:00 – Updated: 2026-03-26 18:00
VLAI
Summary
libcrux Panics During Standalone MAC Operations
Details

An incorrect constant for the key length in libcrux-poly1305 caused the standalone MAC function libcrux_poly1305::mac to always panic with an out-of-bounds memory access.

Impact

Applications wishing to use libcrux-poly1305 as a standalone MAC would experience panics. The use of libcrux-poly1305 in libcrux-chacha20poly1305 is unaffected.

Mitigation

Starting from version 0.0.5, the correct value is used for the key length constant.

Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "libcrux-poly1305"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-125",
      "CWE-805"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-26T18:00:05Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "An incorrect constant for the key length in libcrux-poly1305 caused the standalone MAC function `libcrux_poly1305::mac` to always panic with an out-of-bounds memory access.\n\n## Impact\nApplications wishing to use libcrux-poly1305 as a standalone MAC would experience panics. The use of libcrux-poly1305 in libcrux-chacha20poly1305 is unaffected.\n\n## Mitigation\nStarting from version `0.0.5`, the correct value is used for the key length constant.",
  "id": "GHSA-pv9v-5j35-xwcr",
  "modified": "2026-03-26T18:00:05Z",
  "published": "2026-03-26T18:00:05Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/cryspen/libcrux/pull/1351"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/cryspen/libcrux"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0073.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "libcrux Panics During Standalone MAC Operations"
}



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