CVE-2026-119336

{
  "id": "CVE-2026-119336",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-30T20:17:08.297",
  "lastModified": "2026-10-30T20:17:08.297",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Pi-hole is a DNS sinkhole that protects devices from unwanted content without installing any client-side software. From 6.4.2 until 6.5, the root-run advanced/Scripts/updatecheck.sh cron job applies truncate -s 0 and chmod 644 to /etc/pihole/versions while following symbolic links in a directory owned by the pihole user. An attacker executing as pihole can replace that path with a symlink so the scheduled root operations truncate or create an arbitrary root-owned file, or race the operations so chmod makes a sensitive target world-readable without truncating it. This issue is fixed in version 6.5."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "pi-hole",
          "product": "pi-hole",
          "versions": [
            {
              "version": ">= 6.4.2, < 6.5",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-59"
        },
        {
          "lang": "en",
          "value": "CWE-61"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/pi-hole/pi-hole/commit/85de82dd2b63bf71ecb936177dfb82421d9d2f25",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/pi-hole/pi-hole/commit/c1062f43b0de1876321bafac58fba862406366cb",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/pi-hole/pi-hole/commit/e05dc3f139206fd8d0e4a052dceefb9056533517",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/pi-hole/pi-hole/pull/6719",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/pi-hole/pi-hole/releases/tag/v6.5",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/pi-hole/pi-hole/security/advisories/GHSA-xch2-4qxw-g5vj",
      "source": "[email protected]"
    }
  ]
}