Netgate pfSense CE through 2.9.0 contains a CRLF injection vulnerability in services_unbound_acls.php that allows authenticated users with the DNS Resolver: Access Lists privilege to inject Unbound configuration directives. Attackers can embed CR/LF characters in the aclname or aclaction fields written to access_lists.conf to add local-data, local-zone, or forward-zone directives and control DNS answers served to LAN clients.

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact Low

Subsequent System Availability Impact Low

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Changed

Confidentiality Impact None

Integrity Impact Low

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00811.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Netgate pfSense CE unaffected
Version Status Constraints
0 affected ≤ 2.9.0

Configuration 1 [-]

cpe:2.3:a:pfsense:pfsense:*:*:*:*:community:*:*:*

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://abraxaslabs.tech/research/pfsense-ce-leftovers cve-icon cve-icon
https://github.com/abraxas/pfsense-unbound-acl-crlf cve-icon cve-icon
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/unbound.inc#L1094-L1112 cve-icon cve-icon
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/services_unbound_acls.php#L121-L142 cve-icon cve-icon
https://www.vulncheck.com/advisories/netgate-pfsense-ce-through-2.9.0-crlf-injection-via-services-unbound-acls-php cve-icon cve-icon
History

Mon, 19 Oct 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Pfsense
Pfsense pfsense
CPEs cpe:2.3:a:pfsense:pfsense:*:*:*:*:community:*:*:*
Vendors & Products Pfsense
Pfsense pfsense

Thu, 15 Oct 2026 19:00:00 +0000

Type Values Removed Values Added
Description Netgate pfSense CE through 2.9.0 contains a CRLF injection vulnerability in services_unbound_acls.php that allows authenticated users with the DNS Resolver: Access Lists privilege to inject Unbound configuration directives. Attackers can embed CR/LF characters in the aclname or aclaction fields written to access_lists.conf to add local-data, local-zone, or forward-zone directives and control DNS answers served to LAN clients.
Title Netgate pfSense CE through 2.9.0 CRLF Injection via services_unbound_acls.php
First Time appeared Netgate
Netgate pfsense
Weaknesses CWE-93
CPEs cpe:2.3:a:netgate:pfsense:*:*:*:*:*:*:*:*
Vendors & Products Netgate
Netgate pfsense
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:L'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-15T18:46:26.531Z

Reserved: 2026-10-15T18:21:22.605Z

Link: CVE-2026-111227

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2026-10-15T19:17:35.527

Modified: 2026-10-19T20:42:59.997

Link: CVE-2026-111227

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-16T17:30:13Z

Weaknesses