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Vulnerability Details :

CVE-2026-26952

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-19 Feb, 2026 | 22:43
Updated At-20 Feb, 2026 | 15:40
Rejected At-
Credits

Pi-hole Web Interface has Stored HTML Injection via Local DNS Records (CNAME/Hosts) in data-tag Attribute

Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. Versions 6.4 and below are vulnerable to stored HTML injection through the local DNS records configuration page, which allows an authenticated administrator to inject code that is stored in the Pi-hole configuration and rendered every time the DNS records table is viewed. The populateDataTable() function contains a data variable with the full DNS record value exactly as entered by the user and returned by the API. This value is inserted directly into the data-tag HTML attribute without any escaping or sanitization of special characters. When an attacker supplies a value containing double quotes ("), they can prematurely “close” the data-tag attribute and inject additional HTML attributes into the element. Since Pi-hole implements a Content Security Policy (CSP) that blocks inline JavaScript, the impact is limited. This issue has been fixed in version 6.4.1.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:19 Feb, 2026 | 22:43
Updated At:20 Feb, 2026 | 15:40
Rejected At:
▼CVE Numbering Authority (CNA)
Pi-hole Web Interface has Stored HTML Injection via Local DNS Records (CNAME/Hosts) in data-tag Attribute

Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. Versions 6.4 and below are vulnerable to stored HTML injection through the local DNS records configuration page, which allows an authenticated administrator to inject code that is stored in the Pi-hole configuration and rendered every time the DNS records table is viewed. The populateDataTable() function contains a data variable with the full DNS record value exactly as entered by the user and returned by the API. This value is inserted directly into the data-tag HTML attribute without any escaping or sanitization of special characters. When an attacker supplies a value containing double quotes ("), they can prematurely “close” the data-tag attribute and inject additional HTML attributes into the element. Since Pi-hole implements a Content Security Policy (CSP) that blocks inline JavaScript, the impact is limited. This issue has been fixed in version 6.4.1.

Affected Products
Vendor
pi-hole
Product
web
Versions
Affected
  • < 6.4.1
Problem Types
TypeCWE IDDescription
CWECWE-20CWE-20: Improper Input Validation
CWECWE-79CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWECWE-116CWE-116: Improper Encoding or Escaping of Output
Type: CWE
CWE ID: CWE-20
Description: CWE-20: Improper Input Validation
Type: CWE
CWE ID: CWE-79
Description: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Type: CWE
CWE ID: CWE-116
Description: CWE-116: Improper Encoding or Escaping of Output
Metrics
VersionBase scoreBase severityVector
3.15.4MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Version: 3.1
Base score: 5.4
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/pi-hole/web/security/advisories/GHSA-6xp4-jw73-f4qp
x_refsource_CONFIRM
https://github.com/pi-hole/web/commit/d328f143718022d82dc94c8751121ca41be3b996
x_refsource_MISC
https://github.com/pi-hole/web/releases/tag/v6.4.1
x_refsource_MISC
Hyperlink: https://github.com/pi-hole/web/security/advisories/GHSA-6xp4-jw73-f4qp
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/pi-hole/web/commit/d328f143718022d82dc94c8751121ca41be3b996
Resource:
x_refsource_MISC
Hyperlink: https://github.com/pi-hole/web/releases/tag/v6.4.1
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:19 Feb, 2026 | 23:16
Updated At:20 Feb, 2026 | 13:49

Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. Versions 6.4 and below are vulnerable to stored HTML injection through the local DNS records configuration page, which allows an authenticated administrator to inject code that is stored in the Pi-hole configuration and rendered every time the DNS records table is viewed. The populateDataTable() function contains a data variable with the full DNS record value exactly as entered by the user and returned by the API. This value is inserted directly into the data-tag HTML attribute without any escaping or sanitization of special characters. When an attacker supplies a value containing double quotes ("), they can prematurely “close” the data-tag attribute and inject additional HTML attributes into the element. Since Pi-hole implements a Content Security Policy (CSP) that blocks inline JavaScript, the impact is limited. This issue has been fixed in version 6.4.1.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.4MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 5.4
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-20Primarysecurity-advisories@github.com
CWE-79Primarysecurity-advisories@github.com
CWE-116Primarysecurity-advisories@github.com
CWE ID: CWE-20
Type: Primary
Source: security-advisories@github.com
CWE ID: CWE-79
Type: Primary
Source: security-advisories@github.com
CWE ID: CWE-116
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/pi-hole/web/commit/d328f143718022d82dc94c8751121ca41be3b996security-advisories@github.com
N/A
https://github.com/pi-hole/web/releases/tag/v6.4.1security-advisories@github.com
N/A
https://github.com/pi-hole/web/security/advisories/GHSA-6xp4-jw73-f4qpsecurity-advisories@github.com
N/A
Hyperlink: https://github.com/pi-hole/web/commit/d328f143718022d82dc94c8751121ca41be3b996
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/pi-hole/web/releases/tag/v6.4.1
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/pi-hole/web/security/advisories/GHSA-6xp4-jw73-f4qp
Source: security-advisories@github.com
Resource: N/A

Change History

0
Information is not available yet

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