CVE-2026-35518: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in pi-hole FTL
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.
AI Analysis
Technical Summary
Pi-hole FTL versions from 6.0 to before 6.6 contain an OS command injection vulnerability (CWE-78) in the dns.cnameRecords parameter. Authenticated users can exploit improper input sanitization to inject newline characters, enabling arbitrary dnsmasq configuration directives to be executed. This ultimately allows remote code execution on the host system. The vulnerability has a CVSS 3.1 score of 8.8, indicating high impact on confidentiality, integrity, and availability. The issue is resolved in Pi-hole FTL version 6.6.
Potential Impact
Successful exploitation allows an authenticated attacker to execute arbitrary commands on the underlying system hosting Pi-hole FTL. This can lead to full system compromise, affecting confidentiality, integrity, and availability of the affected system. The vulnerability affects all Pi-hole FTL versions starting from 6.0 up to but not including 6.6. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Upgrade Pi-hole FTL to version 6.6 or later, where this vulnerability is fixed. Since the vulnerability requires authentication, ensure that access to the Pi-hole administrative interface is properly restricted. Patch status is confirmed fixed in version 6.6; no other remediation or temporary fixes are indicated.
CVE-2026-35518: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in pi-hole FTL
Description
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Pi-hole FTL versions from 6.0 to before 6.6 contain an OS command injection vulnerability (CWE-78) in the dns.cnameRecords parameter. Authenticated users can exploit improper input sanitization to inject newline characters, enabling arbitrary dnsmasq configuration directives to be executed. This ultimately allows remote code execution on the host system. The vulnerability has a CVSS 3.1 score of 8.8, indicating high impact on confidentiality, integrity, and availability. The issue is resolved in Pi-hole FTL version 6.6.
Potential Impact
Successful exploitation allows an authenticated attacker to execute arbitrary commands on the underlying system hosting Pi-hole FTL. This can lead to full system compromise, affecting confidentiality, integrity, and availability of the affected system. The vulnerability affects all Pi-hole FTL versions starting from 6.0 up to but not including 6.6. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Upgrade Pi-hole FTL to version 6.6 or later, where this vulnerability is fixed. Since the vulnerability requires authentication, ensure that access to the Pi-hole administrative interface is properly restricted. Patch status is confirmed fixed in version 6.6; no other remediation or temporary fixes are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-03T02:15:39.280Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d52344aaed68159a2ec624
Added to database: 4/7/2026, 3:31:16 PM
Last enriched: 4/7/2026, 3:46:13 PM
Last updated: 4/8/2026, 12:46:27 AM
Views: 8
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