{"id":"CVE-2026-33403","summary":"Pi-hole has a Reflected XSS / HTML injection in taillog.js","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, a reflected DOM-based XSS vulnerability in taillog.js allows an unauthenticated attacker to inject arbitrary HTML into the Pi-hole admin interface by crafting a malicious URL. The file query parameter is interpolated into an innerHTML assignment without escaping. Because the Content-Security-Policy is missing the form-action directive, injected \u003cform\u003e elements can exfiltrate credentials to an external origin. This vulnerability is fixed in 6.5.","aliases":["GHSA-7xqw-r9pr-qv59"],"modified":"2026-08-12T03:51:10.485512749Z","published":"2026-04-06T14:48:05.132Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33403.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33403.json"},{"type":"ADVISORY","url":"https://github.com/pi-hole/web/security/advisories/GHSA-7xqw-r9pr-qv59"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33403"}],"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-2026-33403.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}