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CVE-2026-67189

pfSense Plus/CE Stored XSS via Traffic Graphs PTR Record

Published: Aug 19, 2026Updated: Aug 25, 2026 Sources: CVE List NVDCWE-79
6.1MEDIUM
NVD MITRE
EPSS Score
0.5%
Top 57.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

Netgate
commercial·US
pfSense PlusOn-premNetwork Device
Networking Infrastructure / router-switch
pfSense CEOn-premNetwork Device
Networking Infrastructure / firewall

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://docs.netgate.com/downloads/pfSense-SA-26_21.webgui.asc
docs.netgate.com
https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html
docs.netgate.com
https://docs.netgate.com/pfsense/en/latest/releases/26-07.html
docs.netgate.com
and 1 more references View all →

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