CVE-2026-67189Network attack vector

Stored XSS via unencoded host descriptions

Published Aug 19, 2026 · Updated Aug 25, 2026

Stored XSS in Netgate pfSense Plus before 26.07 and pfSense CE through 2.8.1 allows remote authenticated users to execute JavaScript. The status_graphs.php host-bandwidth table inserts DNS Resolver or Forwarder Host Override descriptions into the page without output encoding. Exploitation requires GUI access to edit a Host Override, the non-default Descriptions display setting, enough matching traffic, and an administrator viewing Traffic Graphs; injected script runs in that administrator's session.

CVSS severity5.3
Medium
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Netgate pfSense Plus before 26.07 and pfSense CE through 2.8.1 allows remote authenticated users to execute JavaScript. The status_graphs.php host-bandwidth table inserts DNS Resolver or Forwarder Host Override descriptions into the page without output encoding. Exploitation requires GUI access to edit a Host Override, the non-default Descriptions display setting, enough matching traffic, and an administrator viewing Traffic Graphs; injected script runs in that administrator's session.

The record

CVE
CVE-2026-67189
Published
Aug 19, 2026
Updated
Aug 25, 2026
Vendor
Netgate
Product
pfSense Plus
Classifications
CWE-79, CAPEC-592, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <26.07

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Netgate · pfSense Plusversion=0 <26.07
Netgate · pfSense CEversion=0 <=2.8.1

Published CVSS scores

6.1VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.3VulnCheck CNACVSS: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 describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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