CVE Explorer
CVE-2026-39849
Pi-hole FTL is the core engine of the Pi-hole network-level advertisement and tracker blocker. In versions before 6.6.1, the `dns.interface` configuration field in Pi-hole FTL accepted newline characters without validation, allowing an attacker to inject arbitrary directives into the generated dnsmasq configuration file. On installations with no admin password set (the default for many deployments), the configuration API is fully accessible without credentials, allowing a network-adjacent attack
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"FTL","vendor":"pi-hole","versions":[{"status":"affected","version":"< 6.6.1"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:2e2f7e3cd9f7452edacce4b3f05c3dd15c9d63bab7251d187e6d9809cf0e5660 · sha256:418efcfa930bcf08… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:2e2f7e3cd9f7452edacce4b3f05c3dd15c9d63bab7251d187e6d9809cf0e5660 · sha256:418efcfa930bcf08… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-93","description":"CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:2e2f7e3cd9f7452edacce4b3f05c3dd15c9d63bab7251d187e6d9809cf0e5660 · sha256:418efcfa930bcf08… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/pi-hole/FTL/commit/0c46e4ec7fe57f762fce261625f2cf5d43806e6d","tags":["x_refsource_MISC"],"url":"https://github.com/pi-hole/FTL/commit/0c46e4ec7fe57f762fce261625f2cf5d43806e6d"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2e2f7e3cd9f7452edacce4b3f05c3dd15c9d63bab7251d187e6d9809cf0e5660 · sha256:418efcfa930bcf08… · /containers/cna/references/1
{"name":"https://github.com/pi-hole/FTL/releases/tag/v6.6.1","tags":["x_refsource_MISC"],"url":"https://github.com/pi-hole/FTL/releases/tag/v6.6.1"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2e2f7e3cd9f7452edacce4b3f05c3dd15c9d63bab7251d187e6d9809cf0e5660 · sha256:418efcfa930bcf08… · /containers/cna/references/2
{"tags":["exploit"],"url":"https://github.com/pi-hole/FTL/security/advisories/GHSA-9cqv-839p-gpq2"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2e2f7e3cd9f7452edacce4b3f05c3dd15c9d63bab7251d187e6d9809cf0e5660 · sha256:418efcfa930bcf08… · /containers/adp/0/references/0
{"name":"https://github.com/pi-hole/FTL/security/advisories/GHSA-9cqv-839p-gpq2","tags":["x_refsource_CONFIRM"],"url":"https://github.com/pi-hole/FTL/security/advisories/GHSA-9cqv-839p-gpq2"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2e2f7e3cd9f7452edacce4b3f05c3dd15c9d63bab7251d187e6d9809cf0e5660 · sha256:418efcfa930bcf08… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.