PatchTheCVECVE-2026-111227: Netgate pfSense CE through 2.9.0 contains a CRLF injection vulnerability in services_unbound_acls.php that all
CVE-2026-111227 is a medium-severity flaw (CVSS 5.5) affecting pfsense. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | High |
| User interaction | None |
| EPSS exploit chance | 1.8% (top 21%) |
| CISA exploited list | No |
| Weakness | CWE-93 |
| Published | 2026-10-15 |
| Last modified | 2026-10-21 |
Last updated 2026-10-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-111227?
pfsense: upgrade to newer than 2.9.0. Exact commands for each OS are on this page.
Is CVE-2026-111227 being exploited?
CVE-2026-111227 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-111227 affect?
CVE-2026-111227 affects pfsense. Severity is medium (CVSS 5.5). 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 em
How urgent is CVE-2026-111227?
Priority 39/100. No elevated risk signals yet.
Software pages
PHP vulnerabilities · pfSense and OPNsense vulnerabilities
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