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    CVE-2026-35518

    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 DNS CNAME records configuration parameter (dns.cnameRecords). 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.

    Published:Apr 7, 2026
    Last Modified:Apr 28, 2026
    EPS:Apr 7, 2026
    EPSS Score:0.00227
    CVSS Score:8.8

    Affected Products

    Vendor
    Pi-hole
    Product
    Ftldns

    Exploits

    https://github.com/pi-hole/FTL/security/advisories/GHSA-28g5-gg88-wh5m

    Related CVEs

    CVE-2026-39849 (CVSS 8.7) — Pi-hole FTL is the core engine of the Pi-hole network-level advertisement and tracker blocker. In versions bef…
    CVE-2026-35521 (CVSS 8.8) — FTLDNS (pihole-FTL) provides an interactive API and also generates statistics for Pi-hole's Web interface. Fro…
    CVE-2026-35520 (CVSS 8.8) — FTLDNS (pihole-FTL) provides an interactive API and also generates statistics for Pi-hole's Web interface. Fro…
    CVE-2026-35519 (CVSS 8.8) — FTLDNS (pihole-FTL) provides an interactive API and also generates statistics for Pi-hole's Web interface. Fro…
    CVE-2026-35517 (CVSS 8.8) — FTLDNS (pihole-FTL) provides an interactive API and also generates statistics for Pi-hole's Web interface. Fro…
    CVE-2026-35491 (CVSS 6.1) — FTLDNS (pihole-FTL) provides an interactive API and also generates statistics for Pi-hole's Web interface. Fro…
    CVE-2021-29448 (CVSS 7.6) — Pi-hole is a Linux network-level advertisement and Internet tracker blocking application. The Stored XSS exist…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High