CVE-2026-67189 PUBLISHED

pfSense Plus/CE Stored XSS via Traffic Graphs PTR Record

Assigner: VulnCheck
Reserved: 28.07.2026 Published: 19.08.2026 Updated: 19.08.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS Score: 5.3

Product Status

Vendor Netgate
Product pfSense Plus
Versions Default: affected
  • affected from 0 to 26.07 (excl.)
Vendor Netgate
Product pfSense CE
Versions Default: affected
  • affected from 0 to 2.8.1 (incl.)

Credits

  • BENDIB MOHAMED ANIS finder
  • VulnCheck coordinator

References

Problem Types

  • Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE