{"id":"CVE-2026-33406","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.","aliases":["GHSA-9rfm-c5g6-538p"],"modified":"2026-07-15T01:49:11.840706546Z","published":"2026-04-06T14:50:35.670Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33406.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-79"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33406.json"},{"type":"ADVISORY","url":"https://github.com/pi-hole/web/security/advisories/GHSA-9rfm-c5g6-538p"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33406"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/pi-hole/web","events":[{"introduced":"a66d859aecb427faad6adfce144fd97fbeb26a13"},{"fixed":"7a17e01c28eeb7af2c43384eccf5d859e3061371"}],"database_specific":{"cpe":"cpe:2.3:a:pi-hole:web_interface:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"6.0"},{"fixed":"6.5"},{"last_affected":"6.4.1"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["v6.4.1","v6.4","v6.3","v6.2.1","v6.1","v6.0.2","v6.0.1","v6.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33406.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"}]}