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TI-2026-26106 Aliases CVE-2026-33727

Pi-hole has a Local Privilege Escalation (post-compromise, pihole -> root).

Priority LOW 31CWE-269Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-269.

Summary

Pi-hole is a Linux network-level advertisement and Internet tracker blocking application. Version 6.4 has a local privilege-escalation vulnerability allows code execution as root from the low-privilege pihole account. Important context: the pihole account uses nologin, so this is not a direct interactive-login issue. However, nologin does not prevent code from running as UID pihole if a Pi-hole component is compromised. In that realistic post-compromise scenario, attacker-controlled content in /etc/pihole/versions is sourced by root-run Pi-hole scripts, leading to root code execution. This vulnerability is fixed in 6.4.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00224 13th percentileScored 2026-11-07
Fix Fixed pi-hole (pi-hole): 6.4.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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-holepi-hole6.4 to before 6.4.16.4.1Patch availableCNA
  • pi-hole VendorPi-hole Affected 6.4 to before 6.4.1 Fixed in 6.4.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pi-hole:pi-hole:6.4:*:*:*:*:*:*:*6.4VulnerablePi-hole
  • cpe:2.3:a:pi-hole:pi-hole:6.4:*:*:*:*:*:*:* Versions 6.4 Vulnerable ·Pi-hole

Remediation

  • Fix · CNA pi-hole (pi-hole) Fixed in 6.4.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33727

References

Advisory 1

  • TI-2020-07073 Pi-hole Web v4.3.2 (aka AdminLTE) allows Remote Code Execution by privileged dashboard… KEVCVSS 3.1HIGH 7.2
  • TI-2020-08981 The Gravity updater in Pi-hole through 4.4 allows an authenticated adversary to upload… CVSS 3.1HIGH 8.8
  • TI-2026-36901 Pi-hole: Local privilege escalation from `pihole` user to root via `/etc/pihole/logrotate` CVSS 3.1HIGH 8.8
  • TI-2024-22701 Pi-hole Blind Server-Side Request Forgery (SSRF) vulnerability can lead to Remote Code Execution (RCE) CVSS 3.1HIGH 8.8
  • TI-2021-12374 (Authenticated) Remote Code Execution Possible in Web Interface 5.5 CVSS 3.1HIGH 8.8
  • TI-2024-18806 Pihole Authenticated Arbitrary File Read with root privileges CVSS 3.1HIGH 7.6
See all 18 →

Sources

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