CVE-2026-44029

{
  "id": "CVE-2026-44029",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-05T01:16:07.170",
  "lastModified": "2026-10-26T19:10:00.163",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via \"nix-prefetch-url --unpack\" or \"nix store prefetch-file --unpack\" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);"
    },
    {
      "lang": "es",
      "value": "Se descubrió un problema en Nix antes de la versión 2.34.7. La escritura en archivos arbitrarios puede ocurrir a través de ’nix-prefetch-url --unpack’ o ’nix store prefetch-file --unpack’ salto de directorio. Las versiones corregidas son 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4 y 2.28.7 (introducido en 2.24.7);"
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "NixOS",
          "product": "Nix",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2.24.7",
              "lessThan": "2.28.7",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "2.29.0",
              "lessThan": "2.29.4",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "2.30.0",
              "lessThan": "2.30.5",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "2.31.0",
              "lessThan": "2.31.5",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "2.32.0",
              "lessThan": "2.32.8",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "2.33.0",
              "lessThan": "2.33.6",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "2.34.0",
              "lessThan": "2.34.7",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-05T12:43:20.590037Z",
          "id": "CVE-2026-44029",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-36"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://discourse.nixos.org/t/security-advisory-local-privilege-escalation-in-lix-and-nix/77407",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/NixOS/nix/security/advisories/GHSA-gr92-w2r5-qw5p",
      "source": "[email protected]"
    },
    {
      "url": "https://www.openwall.com/lists/oss-security/2026/05/04/33",
      "source": "[email protected]"
    }
  ]
}