CVE-2026-33406

See a problem?
Please try reporting it to the source first.

Source

https://cve.org/CVERecord?id=CVE-2026-33406

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33406.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-33406

Aliases

GHSA-9rfm-c5g6-538p

Published

2026-04-06T14:50:35.670Z

Modified

2026-07-15T01:49:11.840706546Z

Severity

5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N CVSS Calculator

Summary

Pi-hole has a Stored HTML attribute injection

Details

Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. From 6.0 to before 6.5, configuration values from the /api/config endpoint are placed directly into HTML value="" attributes without escaping in settings-advanced.js, enabling HTML attribute injection. A double quote in any config value breaks out of the attribute context. JavaScript execution is blocked by the server's CSP (script-src 'self'), but injected attributes can alter element styling for UI redressing. The primary attack vector is importing a malicious teleporter backup, which bypasses per-field server-side validation. This vulnerability is fixed in 6.5.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33406.json"
}

References

Affected packages

Git / github.com/pi-hole/web

Affected ranges

Type

GIT

Repo

https://github.com/pi-hole/web

Events

Introduced

a66d859aecb427faad6adfce144fd97fbeb26a13

Fixed

7a17e01c28eeb7af2c43384eccf5d859e3061371

Database specific

{
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "cpe": "cpe:2.3:a:pi-hole:web_interface:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "6.0"
        },
        {
            "fixed": "6.5"
        },
        {
            "last_affected": "6.4.1"
        }
    ]
}

Affected versions

v6.*

v6.0

v6.0.1

v6.0.2

v6.1

v6.2.1

v6.3

v6.4

v6.4.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33406.json"