pfSense Plus/CE Stored XSS via Traffic Graphs PTR Record (CVE-2026-67189) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-67189

pfSense Plus/CE Stored XSS via Traffic Graphs PTR Record

Answer in brief

CVE-2026-67189 records a Unknown severity vulnerability in pfSense Plus/CE Stored XSS via Traffic Graphs PTR Record. The current sources do not mark it as known exploited. The current feed maps Netgate/pfSense CE (generic), Netgate/pfSense Plus (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 19, 2026Updated Aug 19, 2026Source checked Aug 19, 2026First seen by HOL Aug 19, 2026Material review Aug 19, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Netgate/pfSense CE (generic), Netgate/pfSense Plus (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Netgate/pfSense CEgeneric	0	Not reported
Netgate/pfSense Plusgeneric	>=0 <26.07	26.07

Recommended response

Check inventory. Check lockfiles and deployed manifests for Netgate/pfSense CE, Netgate/pfSense Plus.
Review the reported fix. Update Netgate/pfSense Plus to 26.07 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 19, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.