{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.4.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "85a71bbe1faa36c552a960e6a5f3d0cfb632fbbe"
            }
          ],
          "repo": "https://github.com/moby/sys",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-mjcv-p78q-w5fw"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61801.json"
  },
  "details": "The `github.com/moby/sys/user` package provides Go utilities for parsing and looking up entries in Unix-style user and group database files. Versions before 0.4.1 do not sufficiently limit entries when parsing `/etc/passwd`- or `/etc/group`-style files, allowing an attacker who can supply a specially crafted file to cause excessive memory consumption and potentially terminate the affected process due to an out-of-memory condition. This issue is patched in version 0.4.1. As a workaround, avoid parsing attacker-controlled user or group database files, or validate and limit untrusted input before parsing it.",
  "id": "CVE-2026-61801",
  "modified": "2026-10-10T02:30:22.901380118Z",
  "published": "2026-10-08T16:22:25.558Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61801.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/moby/sys/security/advisories/GHSA-mjcv-p78q-w5fw"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-61801"
    },
    {
      "type": "FIX",
      "url": "https://github.com/moby/sys/commit/85a71bbe1faa36c552a960e6a5f3d0cfb632fbbe"
    },
    {
      "type": "FIX",
      "url": "https://github.com/moby/sys/pull/221"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "github.com/moby/sys/user has a possible DoS via unbounded parsing of user and group database files"
}