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CVE-2026-119335high7.8

Pi-hole: Local privilege escalation from `pihole` user to root via CVE-2026-41489 fix bypass

Impact

Pi-hole versions before 6.5 have a local privilege escalation weakness. An attacker with code execution as the `pihole` user can write a malicious PID file, which is then evaluated by root-run pihole subcommands. This allows OS command injection as root.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

pi-hole · GitHub_M

pi-hole

1 range
GitHub_M version evidence

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affected

< 6.5

unaffected

unknown

Other versions: unknown

Original source description

Pi-hole is a DNS sinkhole that protects devices from unwanted content without installing any client-side software. Prior to 6.5, advanced/Scripts/utils.sh getFTLPID() attempts to validate the pihole-owned /run/pihole-FTL.pid file with expr "${FTL_PID}" : "[^[:digit:]]", but this rejects only values whose first character is not a digit. An attacker with code execution as the pihole user can write a digit-prefixed arithmetic expression to the pihole-owned PID file. Root-run pihole subcommands then evaluate [[ "$pid" -eq "-1" ]], causing Bash to recursively evaluate array subscripts and execute command substitution as root. This bypasses the content-validation portion of the CVE-2026-41489 remediation while leaving its hardcoded PID-file path protection intact. This issue is fixed in version 6.5.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-119335

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-78 ↗

CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

GitHub_M

Related →
Contributing organizations · 1
GitHub_M

Assigning organization

2026-10-30

What changed

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References

4 sources
github.com/pi-hole/pi-hole/security/advisories/GHSA-cf36-4hhc-8398
Security advisoryGitHub_M
github.com/pi-hole/pi-hole/pull/6719
PatchGitHub_M
github.com/pi-hole/pi-hole/commit/555dd4d8b3699327fbba482bb73cce5f53979bd1
PatchGitHub_M
github.com/pi-hole/pi-hole/releases/tag/v6.5
Release notesGitHub_M