How severe is CVE-2026-33405?

CVE-2026-33405 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over local access with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-33405 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33405?

CVE-2026-33405 affects Pi-hole Web Interface. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33405?

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

Does CVE-2026-33405 have an EU (EUVD) identifier?

Yes. CVE-2026-33405 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19283.

When was CVE-2026-33405 published?

CVE-2026-33405 was published on 2026-04-06 and last updated on 2026-06-17.

CVE-2026-33405

CVE-2026-33405 is a low-severity vulnerability in Pi-hole Web Interface with a CVSS 3.x base score of 3.1. 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 3.1)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19283
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, the formatInfo() function in queries.js renders data.upstream, data.client.ip, and data.ede.text into HTML without escaping when a user expands a query row in the Query Log, enabling stored HTML injection. JavaScript execution is blocked by the server's CSP (script-src 'self'). The same fields are properly escaped in the table view (rowCallback), confirming the omission was an oversight. This vulnerability is fixed in 6.5.

Frequently asked questions

What is CVE-2026-33405?: 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, the formatInfo() function in queries.js renders data.upstream, data.client.ip, and data.ede.text into HTML without escaping when a user expands a query row in the Query Log, enabling stored HTML injection. JavaScript execution is blocked by the server's CSP (script-src 'self'). The same fields are properly escaped in the table view (rowCallback), confirming the omission was an oversight. This vulnerability is fixed in 6.5.
How severe is CVE-2026-33405?: CVE-2026-33405 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over local access with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-33405 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33405?: CVE-2026-33405 affects Pi-hole Web Interface. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33405?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33405 have an EU (EUVD) identifier?: Yes. CVE-2026-33405 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19283.
When was CVE-2026-33405 published?: CVE-2026-33405 was published on 2026-04-06 and last updated on 2026-06-17.

References

https://github.com/pi-hole/web/security/advisories/GHSA-jx8x-mj2r-62vq

Affected products (1)

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

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