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TI-2026-83378 Aliases CVE-2026-119334

Pi-hole file:// adlist check can be bypassed to read other files

Priority LOW 12CWE-59Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-59 and the CVSS impact.

Summary

Pi-hole before 6.5 has a flaw in how gravity.sh checks file:// adlist URLs. The readability check runs as the pihole user, but curl may run as root and normalize URL dot segments to open a different file, which is improper link resolution (CWE-59). An administrator who can add adlists and place a symlink and a decoy file on the filesystem can make curl read a root-only file.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

Pi-hole is a DNS sinkhole that protects devices from unwanted content without installing any client-side software. Prior to 6.5, gravity.sh checks file:// adlist readability with sudo -u pihole test -r but then allows curl, sometimes running as root, to normalize URL dot segments and open a different file. A pihole-readable decoy can therefore pass the check while curl reads a root-only target, and /proc/self paths can similarly resolve against different processes. Exploitation requires an administrator who can add adlists and can place a symlink and decoy on the filesystem. This issue is fixed in version 6.5.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00343 28th percentileScored 2026-11-07
Fix Fixed pi-hole (pi-hole): 6.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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-holepi-holebefore 6.56.5Patch availableCNA
  • pi-hole VendorPi-hole Affected before 6.5 Fixed in 6.5 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:pi-hole:pi-hole:*:*:*:*:*:*:*:*——Pi-hole
  • cpe:2.3:a:pi-hole:pi-hole:*:*:*:*:*:*:*:* Versions — — ·Pi-hole

Remediation

Upgrade Pi-hole to version 6.5, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

  • Fix · CNA pi-hole (pi-hole) Fixed in 6.5

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-119334
  2. 2026-11-02 CISA SSVC decision points changed

References

Other 4

  • 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-2026-32584 Pi-hole FTL: Unauthenticated Session Hijacking via Race Condition on Global Session Buffer CVSS 3.1HIGH 8.8
  • TI-2026-30076 Pi-hole: Local privilege escalation via config-controlled path in root-executed service hooks CVSS 3.1HIGH 8.8
  • TI-2026-28731 Pi-hole FTL remote code execution via newline injection in dns.interface configuration CVSS 4.0HIGH 8.7
See all 47 →

Sources

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