Pi-hole: file:// adlist read check and curl can resolve different files

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Summary

CVECVE-2026-119334
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-30 20:17:07 UTC
Updated2026-10-30 20:17:07 UTC
DescriptionPi-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.

Risk And Classification

Primary CVSS: v3.1 2.2 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N

Problem Types: CWE-59 | CWE-59 CWE-59: Improper Link Resolution Before File Access ('Link Following')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary2.2LOWCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED2.2LOWCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Pi-hole Pi-hole affected < 6.5 Not specified

References

ReferenceSourceLinkTags
github.com/pi-hole/pi-hole/commit/14554737be53c392abffc69677f6b9df02ae7971 [email protected] github.com
github.com/pi-hole/pi-hole/releases/tag/v6.5 [email protected] github.com
github.com/pi-hole/pi-hole/pull/6719 [email protected] github.com
github.com/pi-hole/pi-hole/security/advisories/GHSA-g63w-24cr-p3w6 [email protected] github.com
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