Netgate pfSense Plus/pfSense CE Traffic Graphs top-talkers feature cross site scripting

Summaryinfo

A vulnerability was found in Netgate pfSense Plus and pfSense CE. It has been declared as problematic. This impacts an unknown function of the component Traffic Graphs top-talkers feature. The manipulation results in cross site scripting. This vulnerability is identified as CVE-2026-67189. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in Netgate pfSense Plus and pfSense CE (version now known). Affected is some unknown processing of the component Traffic Graphs top-talkers feature. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

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.

The advisory is shared for download at docs.netgate.com. This vulnerability is traded as CVE-2026-67189 since 07/28/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation needs additional levels of successful authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Firewall Software

Vendor

• Netgate

Name

• pfSense CE
• pfSense Plus

License

• open-source

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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