What’s Vulnerable › Vulnerabilities

CVE-2026-111227: Netgate pfSense CE through 2.9.0 CRLF Injection via services_unbound_acls.php

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-15 · updated 2026-10-21
• Weakness: CWE-93

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.

Affected products

• Netgate pfSense CE: through 2.9.0

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

Get alerted when CVE-2026-111227 or the next vulnerability affects your stack