Vulnerability · Published Aug 19, 2026 · Assigned by VulnCheck

CVE-2026-67189pfSense Plus/CE Stored XSS via Traffic Graphs PTR Record

Medium 6.1

In plain English

A medium-severity cross-site scripting in pfSense CE from Netgate. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 67% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)1.2%top 32.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

pfSense Plus before 26.07 and pfSense CE through 2.8.1 contain a stored cross-site scripting vulnerability in the Traffic Graphs top-talkers feature, where PTR records returned by reverse DNS lookups are incorporated without sanitization into AJAX responses and rendered as HTML through a DOM sink in the administrator interface. An attacker who controls a PTR record and generates sufficient traffic to appear as a top talker can execute arbitrary JavaScript in an administrator's browser, gaining access to the authenticated session context and same-origin access to the firewall management interface, enabling account creation and arbitrary OS command execution.

Affected products (as reported)

Vendor	Product	Versions
Netgate	pfSense Plus	0 – before 26.07
Netgate	pfSense CE	0 – through 2.8.1

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Vendor Advisory vendor-advisory
Plus Release Notes release-notes
CE Release Notes release-notes
https://www.vulncheck.com/advisories/pfsense-plus-ce-stored-xss-via-traffic-graphs-ptr-record third-party-advisory