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

Quick assessment

Affected
Netgate pfSense Plus
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Netgate pfsense plus是斯洛伐克Netgate公司的一款专业防火墙系统。 Netgate pfsense plus 26.07之前版本和pfSense CE 2.8.1及之前版本存在跨站脚本漏洞，该漏洞源于Traffic Graphs top-talkers功能中反向DNS查找返回的PTR记录未经清理便合并到AJAX响应中，并通过DOM sink在管理员界面中呈现为HTML，可能导致攻击者控制PTR记录并生成足够流量成为top talker，在管理员浏览器中执行任意JavaScript，

CVSS 6.1 · Medium EPSS 1.17% · P67

Affected Version Matrix 2

VendorProduct Version RangeStatus
Netgate pfSense CE ≤ 2.8.1 affected
Netgate pfSense Plus < 26.07 affected
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I. Basic Information for CVE-2026-67189

Vulnerability Information
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Vulnerability Title
pfSense Plus/CE Stored XSS via Traffic Graphs PTR Record
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Netgate pfsense plus 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Netgate pfsense plus是斯洛伐克Netgate公司的一款专业防火墙系统。 Netgate pfsense plus 26.07之前版本和pfSense CE 2.8.1及之前版本存在跨站脚本漏洞，该漏洞源于Traffic Graphs top-talkers功能中反向DNS查找返回的PTR记录未经清理便合并到AJAX响应中，并通过DOM sink在管理员界面中呈现为HTML，可能导致攻击者控制PTR记录并生成足够流量成为top talker，在管理员浏览器中执行任意JavaScript，
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Netgate pfSense Plus 0 ~ 26.07 -
Netgate pfSense CE 0 ~ 2.8.1 -

II. Public POCs for CVE-2026-67189

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III. Intelligence Information for CVE-2026-67189

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Vendor Advisories for CVE-2026-67189 (2)

Vendor Pages for CVE-2026-67189 (2)

IV. Related Vulnerabilities

Same product: pfSense Plus
Same vendor: Netgate
Same weakness: CWE-79

V. Comments for CVE-2026-67189

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