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TI-2026-27620 Aliases CVE-2026-35491

Pi-hole FTL: CLI API sessions can import Teleporter archives and modify configuration

Priority MEDIUM 60CWE-863Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-863.

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, Pi-hole FTL supports a CLI password feature (webserver.api.cli_pw) that creates “CLI” API sessions intended to be read-only for configuration changes. While /api/config correctly blocks CLI sessions from mutating configuration, /api/teleporter allowed Teleporter imports for CLI sessions, enabling a CLI-scoped session to overwrite configuration via a Teleporter archive (authorization bypass). This vulnerability is fixed in 6.6.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00162 5th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed FTL (pi-hole): 6.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Pi-holeFTL6.0 to before 6.66.6Patch availableCNA
  • FTL VendorPi-hole Affected 6.0 to before 6.6 Fixed in 6.6 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pi-hole:ftldns:*:*:*:*:*:*:*:*6.0 to before 6.6VulnerablePi-hole
  • cpe:2.3:a:pi-hole:ftldns:*:*:*:*:*:*:*:* Versions 6.0 to before 6.6 Vulnerable ·Pi-hole

Remediation

  • Fix · CNA FTL (pi-hole) Fixed in 6.6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-35491

References

Exploit 1

  • TI-2026-28731 Pi-hole FTL remote code execution via newline injection in dns.interface configuration CVSS 4.0HIGH 8.7
  • TI-2026-27638 Pi-hole FTL affected by Remote Code Execution (RCE) via dhcp.hosts Newline Injection CVSS 3.1HIGH 8.8
  • TI-2026-27637 Pi-hole FTL affected by Remote Code Execution (RCE) via dhcp.leaseTime Newline Injection CVSS 3.1HIGH 8.8
  • TI-2026-27636 Pi-hole FTL affected by Remote Code Execution (RCE) via dns.hostRecord Newline Injection CVSS 3.1HIGH 8.8
  • TI-2026-27635 Pi-hole FTL affected by Remote Code Execution (RCE) via dns.cnameRecords Newline Injection CVSS 3.1HIGH 8.8
  • TI-2026-27634 Pi-hole FTL affected by Remote Code Execution (RCE) via dns.upstreams Newline Injection CVSS 3.1HIGH 8.8
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences