CVE-2026-111233: Netgate pfSense CE

Netgate pfSense CE 2.7.1 through 2.9.0 Reflected XSS via firewall_rules.php

CVSS 2.3 LowEPSS 0.011 · 64th percentile

Published by the CVE Program (CNA: VulnCheck) at 15 Oct 2026, 18:46 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Netgate	pfSense CE https://github.com pkg:github/pfsense/pfsense	affected 2.7.1 to 2.9.0, inclusive semver Other versions: unaffected

Identifiers

CVE-2026-111233

CNA

VulnCheck

Weakness (CWE)

CWE-79

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
2.3	Low	4.0	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N	CNA (VulnCheck)Used for this record
4.7	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.011, the 64th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 15 Oct 2026. New records show when each source confirmed them.

Sources

References from the CNA

abraxaslabs.tech/research/pfsense-ce-leftovers technical-description
github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/firewall_rules.php#L138-L146 technical-description
github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/firewall_rules.php#L391 technical-description
www.vulncheck.com/advisories/netgate-pfsense-ce-2.7.1-through-2.9.0-reflected-xss-via-firewall-rules-php third-party-advisory
github.com/abraxas/pfsense-rules-if-xss exploittechnical-description

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.