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CVE-2026-35519 is a remote code execution vulnerability in FTLDNS (Pi-hole FTL) affecting versions 6.0 through before 6.6. The flaw is in the DNS host record configuration parameter dns.hostRecord. An authenticated attacker can supply newline characters in this parameter to inject arbitrary dnsmasq configuration directives. Because the injected directives are processed by the underlying DNS service stack, this can be leveraged to achieve command execution on the host running Pi-hole. The provided context also maps the issue to CWE-93 in addition to CWE-78, consistent with improper neutralization of CRLF/newline input enabling downstream command injection behavior.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
dns.hostRecord. Audit existing host record settings for embedded newline characters or unexpected dnsmasq directives, remove untrusted entries, and limit network exposure of management interfaces. These are temporary risk-reduction measures only; the definitive mitigation is upgrading to 6.6 or later.Patch, then assume compromise.
dns.hostRecord for malicious or malformed newline-containing values.No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.