CVE-2026-35491: CWE-863: Incorrect Authorization 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, 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.
AI Analysis
Technical Summary
Pi-hole FTL (FTLDNS) provides an interactive API and statistics for the Pi-hole Web interface. Versions 6.0 through 6.5 include a CLI password feature that creates read-only CLI API sessions for configuration changes. While the /api/config endpoint correctly restricts CLI sessions from modifying configuration, the /api/teleporter endpoint did not enforce this restriction, allowing CLI sessions to import Teleporter archives and overwrite configuration data. This constitutes an incorrect authorization vulnerability (CWE-863). The issue is resolved in Pi-hole FTL version 6.6.
Potential Impact
An attacker with CLI password access (limited privileges) can bypass intended read-only restrictions and overwrite Pi-hole configuration by importing Teleporter archives. This could lead to unauthorized configuration changes, potentially disrupting DNS filtering or other Pi-hole functions. There is no indication of confidentiality or availability impact beyond limited denial of service or configuration tampering. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade Pi-hole FTL to version 6.6 or later where this vulnerability is fixed. Since the vulnerability is resolved in 6.6, applying this official fix fully mitigates the issue. No other temporary workarounds or mitigations are documented.
CVE-2026-35491: CWE-863: Incorrect Authorization 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, 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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Pi-hole FTL (FTLDNS) provides an interactive API and statistics for the Pi-hole Web interface. Versions 6.0 through 6.5 include a CLI password feature that creates read-only CLI API sessions for configuration changes. While the /api/config endpoint correctly restricts CLI sessions from modifying configuration, the /api/teleporter endpoint did not enforce this restriction, allowing CLI sessions to import Teleporter archives and overwrite configuration data. This constitutes an incorrect authorization vulnerability (CWE-863). The issue is resolved in Pi-hole FTL version 6.6.
Potential Impact
An attacker with CLI password access (limited privileges) can bypass intended read-only restrictions and overwrite Pi-hole configuration by importing Teleporter archives. This could lead to unauthorized configuration changes, potentially disrupting DNS filtering or other Pi-hole functions. There is no indication of confidentiality or availability impact beyond limited denial of service or configuration tampering. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade Pi-hole FTL to version 6.6 or later where this vulnerability is fixed. Since the vulnerability is resolved in 6.6, applying this official fix fully mitigates the issue. No other temporary workarounds or mitigations are documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-02T20:49:44.454Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d52344aaed68159a2ec613
Added to database: 4/7/2026, 3:31:16 PM
Last enriched: 4/7/2026, 3:48:16 PM
Last updated: 4/8/2026, 12:43:26 AM
Views: 6
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