FKIE_CVE-2026-35521

Vulnerability from fkie_nvd - Published: 2026-04-07 16:16 - Updated: 2026-10-26 21:10
Severity
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
FTLDNS (pihole-FTL) provides an interactive API and also generates statistics for Pi-hole's Web interface. From 6.0 to before 6.6, the Pi-hole FTL engine contains a Remote Code Execution (RCE) vulnerability in the DHCP hosts configuration parameter (dhcp.hosts). This vulnerability allows an authenticated attacker to inject arbitrary dnsmasq configuration directives through newline characters, ultimately achieving command execution on the underlying system. This vulnerability is fixed in 6.6.
References
security-advisories@github.comhttps://github.com/pi-hole/FTL/security/advisories/GHSA-vfmq-jrx3-wv3cExploit, Vendor Advisory
Impacted products
Vendor Product Version
pi-hole ftldns *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "FTL",
          "vendor": "pi-hole",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 6.0, \u003c 6.6"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:pi-hole:ftldns:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8C927FF0-74A4-4F13-95A8-E80C5E80F607",
              "versionEndIncluding": "6.5",
              "versionStartIncluding": "6.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "FTLDNS (pihole-FTL) provides an interactive API and also generates statistics for Pi-hole\u0027s Web interface. From 6.0 to before 6.6, the Pi-hole FTL engine contains a Remote Code Execution (RCE) vulnerability in the DHCP hosts configuration parameter (dhcp.hosts). This vulnerability allows an authenticated attacker to inject arbitrary dnsmasq configuration directives through newline characters, ultimately achieving command execution on the underlying system. This vulnerability is fixed in 6.6."
    },
    {
      "lang": "es",
      "value": "FTLDNS (pihole-FTL) proporciona una API interactiva y tambi\u00e9n genera estad\u00edsticas para la interfaz web de Pi-hole. Desde la versi\u00f3n 6.0 hasta antes de la 6.6, el motor FTL de Pi-hole contiene una vulnerabilidad de ejecuci\u00f3n remota de c\u00f3digo (RCE) en el par\u00e1metro de configuraci\u00f3n de hosts DHCP (dhcp.hosts). Esta vulnerabilidad permite a un atacante autenticado inyectar directivas de configuraci\u00f3n arbitrarias de dnsmasq a trav\u00e9s de caracteres de nueva l\u00ednea, logrando finalmente la ejecuci\u00f3n de comandos en el sistema subyacente. Esta vulnerabilidad est\u00e1 corregida en la 6.6."
    }
  ],
  "id": "CVE-2026-35521",
  "lastModified": "2026-10-26T21:10:00.170",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-35521",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-07T18:21:35.967672Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-07T16:16:28.693",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/pi-hole/FTL/security/advisories/GHSA-vfmq-jrx3-wv3c"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        },
        {
          "lang": "en",
          "value": "CWE-93"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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