{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "tough"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.20.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": true,
    "github_reviewed_at": "2025-03-28T22:13:16Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "## Summary\n\nIn a TUF repository, the targets role\u2019s signature indicates which target files are trusted by clients. The role can delegate full or partial trust to other roles, meaning that that role is trusted to sign target file metadata. Delegated roles can further delegate trust to other delegated roles. When searching for metadata about a given target, tough failed to detect cyclical role delegations.\n\n## Impact\n\nWhen interacting with TUF repositories which contain cyclical role delegations, tough will fail to detect the cycles and will exhaust its stack while recursively searching the delegation graph. The exhausted call stack will cause the process to abort.\n\nImpacted versions: \u003c v0.20.0\n\n## Patches\n\nA fix for this issue is available in tough version 0.20.0 and later. Customers are advised to upgrade to version 0.20.0 or later and ensure any forked or derivative code is patched to incorporate the new fixes.\n\n## Workarounds\n\nThere is no recommended work around. Customers are advised to upgrade to version 0.20.0 or the latest version.\n\n## References\n\nIf you have any questions or comments about this advisory we ask that you contact AWS/Amazon Security via our vulnerability reporting page [1] or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.\n\n\n[1] Vulnerability reporting page: https://aws.amazon.com/security/vulnerability-reporting\n\n## Acknowledgement\n\nThese issues were identified by the [TUF-Conformance project](https://github.com/theupdateframework/tuf-conformance). We would like to thank Google for collaborating on this issue through the coordinated vulnerability disclosure process.",
  "id": "GHSA-j8x2-777p-23fc",
  "modified": "2025-04-02T23:02:55Z",
  "published": "2025-03-28T22:13:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/awslabs/tough/security/advisories/GHSA-j8x2-777p-23fc"
    },
    {
      "type": "WEB",
      "url": "https://github.com/awslabs/tough/commit/c5ee1718e630fdedc5676bf71b5bef10e4c7f91c"
    },
    {
      "type": "WEB",
      "url": "https://aws.amazon.com/security/security-bulletins/AWS-2025-007"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/awslabs/tough"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "tough cyclic delegation graphs are not detected"
}