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VulnerabilityPublished

CVE-2026-33404: pi-hole web · Cross-site Scripting

Affects pi-hole webSource CVE Database V5

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Not known to be exploited · CVSS 3.4 Low : upgrade to 6.5 when convenient.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 3.1 base score
3.4Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 6.5
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade web and pi-hole/web to 6.5.

Affected software

ProductAffectedFixed in
pi-holewebAffected
  • >=6.0 <6.5
Fixed in
  • 6.5
GitHubpi-hole/webpkg:github/pi-hole/webOther threatsAffected
  • <6.5
Fixed in
  • 6.5

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

This vulnerability is fixed in Pi-hole version 6.5. Users should upgrade to version 6.5 or later to remediate this issue. Since the product is not a cloud service, remediation requires applying the official update. Patch status is confirmed by the vendor advisory indicating the fix in version 6.5.

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.

References

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