CVE-2026-111227

EUVD-2026-102339

15.10.2026, 19:17

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.

CRLF Injection

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
VulnCheck	CNA	5.5 MEDIUM	NETWORK	LOW	HIGH	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:L

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources.

Vendor	Product	Version	Source
netgate	pfsense	𝑥 ≤ 2.9.0	CNA

Common Weakness Enumeration

CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
The software uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.

References

https://abraxaslabs.tech/research/pfsense-ce-leftovers

https://github.com/abraxas/pfsense-unbound-acl-crlf

https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/unbound.inc#L1094-L1112

https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/services_unbound_acls.php#L121-L142

https://www.vulncheck.com/advisories/netgate-pfsense-ce-through-2.9.0-crlf-injection-via-services-unbound-acls-php