How severe is CVE-2026-33404?

CVE-2026-33404 has a CVSS 3.x base score of 3.4, rated low severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-33404 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33404?

CVE-2026-33404 affects Pi-hole Web Interface. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33404?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33404 have an EU (EUVD) identifier?

Yes. CVE-2026-33404 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19281.

When was CVE-2026-33404 published?

CVE-2026-33404 was published on 2026-04-06 and last updated on 2026-06-17.

CVE-2026-33404

CVE-2026-33404 is a low-severity vulnerability in Pi-hole Web Interface with a CVSS 3.x base score of 3.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Low (CVSS 3.x base score 3.4)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19281
Weakness: CWE-79
Affected product: Pi-hole Web Interface
Published: 2026-04-06
Last modified: 2026-06-17

Description

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, client hostnames and IP addresses from the FTL database are rendered into the DOM without escaping in network.js (Network page) and charts.js/index.js (Dashboard chart tooltips). While upstream validation in dnsmasq and FTL blocks HTML characters via normal DHCP/DNS paths, the web UI performs no output escaping — an inconsistency with other fields in the same file that are properly escaped. This vulnerability is fixed in 6.5.

Frequently asked questions

What is CVE-2026-33404?: 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, client hostnames and IP addresses from the FTL database are rendered into the DOM without escaping in network.js (Network page) and charts.js/index.js (Dashboard chart tooltips). While upstream validation in dnsmasq and FTL blocks HTML characters via normal DHCP/DNS paths, the web UI performs no output escaping — an inconsistency with other fields in the same file that are properly escaped. This vulnerability is fixed in 6.5.
How severe is CVE-2026-33404?: CVE-2026-33404 has a CVSS 3.x base score of 3.4, rated low severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-33404 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33404?: CVE-2026-33404 affects Pi-hole Web Interface. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33404?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33404 have an EU (EUVD) identifier?: Yes. CVE-2026-33404 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19281.
When was CVE-2026-33404 published?: CVE-2026-33404 was published on 2026-04-06 and last updated on 2026-06-17.

References

https://github.com/pi-hole/web/security/advisories/GHSA-px6w-85wp-ww9v

Affected products (1)

cpe:2.3:a:pi-hole:web_interface:*:*:*:*:*:*:*:*

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