What is CVE-2026-33403?

CVE-2026-33403 is a medium-severity vulnerability in Pi-hole Web, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-06.

How severe is CVE-2026-33403?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Pi-hole Web

CVE-2026-33403

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…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (26.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Pi-hole Web — versions >= 6.0, < 6.5

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/pi-hole/web/security/advisories/GHSA-7xqw-r9pr-qv59 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-33403?: CVE-2026-33403 is a medium-severity vulnerability in Pi-hole Web, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-06.
How severe is CVE-2026-33403?: Medium severity. CVSS v3 base score is 6.1 out of 10.