Pi-hole: Local privilege escalation from `pihole` user to root via `/etc/pihole/logrotate`

{
  "id": "666c831071a69d5a725334cebb4bb7196cf76441e8722a2d34de2ecdddb694b7",
  "url": "https://osv.dev/vulnerability/CVE-2026-50130",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Pi-hole: Local privilege escalation from `pihole` user to root via `/etc/pihole/logrotate`",
    "summary": "Pi-hole is a DNS sinkhole that protects devices from unwanted content without installing any client-side software. From 6.0 to 6.4.2, a user with code execution as the unprivileged pihole user can escalate to root by replacing /etc/pihole/logrotate. The replacement is laundered to root:root ownership by pihole-FTL-prestart.sh and then parsed as root by the daily pihole flush cron, executing firstaction shell as uid 0. This issue is fixed in version 6.4.3.",
    "evidence": "osv:CVE-2026-50130",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-50130",
      "aliases": [
        "CVE-2026-50130",
        "GHSA-h8w9-qx2v-wrww"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/pi-hole/pi-hole",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2d81552f9f16fb5e12df31069078b43f0e826c3b"
                },
                {
                  "fixed": "f47b8ede5a8e38f9c703202d324a074dbdba4ca9"
                },
                {
                  "fixed": "18002bf7c6bf382fe5861d01321f427019e1be89"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:pi-hole:pi-hole:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "6.0"
                      },
                      {
                        "fixed": "6.4.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "18002bf7c6bf382fe5861d01321f427019e1be89"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f47b8ede5a8e38f9c703202d324a074dbdba4ca9"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v6.4.3"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v6.4.2",
            "v6.4.1",
            "v6.4",
            "v6.3",
            "v6.2.2",
            "v6.2.1",
            "v6.2",
            "v6.1.4",
            "v6.1.3",
            "v6.1.2",
            "v6.1",
            "v6.0.6",
            "v6.0.5",
            "v6.0.4",
            "v6.0.3",
            "v6.0.1",
            "v6.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50130.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.389687324Z",
      "provider": "osv",
      "references": [
        "https://github.com/pi-hole/pi-hole/releases/tag/v6.4.3",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50130.json",
        "https://github.com/pi-hole/pi-hole/security/advisories/GHSA-h8w9-qx2v-wrww",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-50130",
        "https://github.com/pi-hole/pi-hole/commit/18002bf7c6bf382fe5861d01321f427019e1be89"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-282"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50130.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-50130",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519008,
  "published_at": "2026-07-14T21:35:00.813+00:00"
}