CVE-2026-26953 is a Stored HTML Injection vulnerability in the Pi-hole Admin Interface, affecting versions 6.0 and above. An authenticated attacker can inject arbitrary HTML into the active sessions table by manipulating the X-Forwarded-For header, which is then rendered for any administrator viewing the page. The vulnerability has a CVSS score of 5.4 (Medium), indicating a low attack complexity and requiring authentication, with potential impacts limited to information disclosure or defacement due to a restrictive Content Security Policy. There is no known active exploitation, public exploit code, or significant community discussion surrounding this CVE. The issue has been patched in Pi-hole version 6.4.1.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 6.0, < 6.4.1CPE matchmatch criteria | cpe:2.3:a:pi-hole:web_interface:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
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Remediation records are not available for this CVE.