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CVE-2026-111227 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://abraxaslabs.tech/research/pfsense-ce-leftovers	[email protected]	Issue Tracking
https://github.com/abraxas/pfsense-unbound-acl-crlf	[email protected]	Third Party Advisory
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/unbound.inc#L1094-L1112	[email protected]	Product
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/services_unbound_acls.php#L121-L142	[email protected]	Product
https://www.vulncheck.com/advisories/netgate-pfsense-ce-through-2.9.0-crlf-injection-via-services-unbound-acls-php	[email protected]	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-93	Improper Neutralization of CRLF Sequences ('CRLF Injection')	[email protected]

Affected Products

Product	Versions
pfsense pfsense	<= 2.9.0
CPE cpe:2.3:a:pfsense:pfsense:::::community:::* Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Oct 21, 2026	CVE Modified	CISA-ADP
Oct 19, 2026	Initial Analysis	[email protected]
Oct 15, 2026	New CVE Received	[email protected]