CVE-2026-35491: CWE-863: Incorrect Authorization in pi-hole FTL
A vulnerability in Pi-hole FTL versions 6.0 up to before 6.6 allows CLI-scoped API sessions, which are intended to be read-only, to bypass authorization and overwrite configuration via the /api/teleporter endpoint. This occurs because /api/teleporter did not properly restrict Teleporter imports for CLI sessions, unlike /api/config which correctly blocked such mutations. The issue is identified as CWE-863 (Incorrect Authorization) and has a CVSS score of 6.1 (medium severity). The vulnerability is fixed in version 6.6.
AI Analysis
Technical Summary
Pi-hole FTL (FTLDNS) provides an interactive API and statistics for the Pi-hole Web interface. From version 6.0 to before 6.6, the CLI password feature (webserver.api.cli_pw) creates CLI API sessions intended to be read-only for configuration changes. However, the /api/teleporter endpoint allowed these CLI sessions to import Teleporter archives, effectively enabling unauthorized configuration changes. This represents an authorization bypass vulnerability (CWE-863). The vulnerability is resolved in Pi-hole FTL version 6.6.
Potential Impact
An attacker with CLI API session access could overwrite Pi-hole configuration by importing Teleporter archives, despite CLI sessions being intended as read-only. This could lead to unauthorized configuration changes, potentially impacting the integrity of the Pi-hole service. There is no indication of confidentiality or availability impact beyond limited availability impact (low). 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 additional mitigations are indicated.
CVE-2026-35491: CWE-863: Incorrect Authorization in pi-hole FTL
Description
A vulnerability in Pi-hole FTL versions 6.0 up to before 6.6 allows CLI-scoped API sessions, which are intended to be read-only, to bypass authorization and overwrite configuration via the /api/teleporter endpoint. This occurs because /api/teleporter did not properly restrict Teleporter imports for CLI sessions, unlike /api/config which correctly blocked such mutations. The issue is identified as CWE-863 (Incorrect Authorization) and has a CVSS score of 6.1 (medium severity). The vulnerability is fixed in version 6.6.
CVSS v3.1
Score 6.1medium
Affected software
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Weaknesses
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. From version 6.0 to before 6.6, the CLI password feature (webserver.api.cli_pw) creates CLI API sessions intended to be read-only for configuration changes. However, the /api/teleporter endpoint allowed these CLI sessions to import Teleporter archives, effectively enabling unauthorized configuration changes. This represents an authorization bypass vulnerability (CWE-863). The vulnerability is resolved in Pi-hole FTL version 6.6.
Potential Impact
An attacker with CLI API session access could overwrite Pi-hole configuration by importing Teleporter archives, despite CLI sessions being intended as read-only. This could lead to unauthorized configuration changes, potentially impacting the integrity of the Pi-hole service. There is no indication of confidentiality or availability impact beyond limited availability impact (low). 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 additional mitigations are indicated.
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: 04/07/2026, 15:31:16 UTC
Last enriched: 04/14/2026, 15:55:47 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 101
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