CVE-2026-111227: netgate pfsense ce CRLF Injection

Vulnerability summary

CVE-2026-111227 is a medium (CVSS 5.5) CRLF Injection vulnerability in netgate pfsense ce. EPSS estimates a 1.84% chance of exploitation in the next 30 days, higher than 78.7% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 15-10-2026
   PublishedVulnerability first disclosed.
2. 21-10-2026
   Last modifiedVulnerability information updated.

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.

• CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')The product 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.