CVE-2026-33404: Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker block

Routine

LOW 3.4UPGRADE

CVE-2026-33404 is a low-severity flaw (CVSS 3.4) affecting web interface. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 ou

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.4 (Low)
Attack vector	Local
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-04-06
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: pi-hole

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-06 15:17 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

pi-hole web interface UPGRADE

Affected: >= 6.0 and <= 6.4.1

Fixed in: newer than 6.4.1

Safe to downgrade to: a release before 6.0

1. Check installed version

apt-cache policy web-interface || rpm -q web-interface || web-interface --version

2. UPGRADE to newer than 6.4.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade web-interface

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade web-interface

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.0 (Debian / Ubuntu)

apt-cache madison web-interface sudo apt install web-interface=<VERSION_BEFORE_6.0> sudo apt-mark hold web-interface

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list web-interface sudo dnf downgrade web-interface-<VERSION_BEFORE_6.0> sudo dnf versionlock add web-interface

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33404?

web interface: upgrade to newer than 6.4.1. Exact commands for each OS are on this page.

Is CVE-2026-33404 being exploited?

CVE-2026-33404 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33404 affect?

CVE-2026-33404 affects web interface. Severity is low (CVSS 3.4). 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

How urgent is CVE-2026-33404?

Priority 13/100. No elevated risk signals yet.

Software pages

Dnsmasq vulnerabilities

Related CVEs

CVE-2026-33765 CRITICAL 9.8 UPGRADE Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker block
CVE-2026-33406 MEDIUM 5.4 UPGRADE Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker block
CVE-2026-33403 MEDIUM 6.1 UPGRADE Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker block
CVE-2026-33405 LOW 3.1 UPGRADE Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker block

References

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