CVE-2026-67189 (GCVE-0-2026-67189)

Vulnerability from cvelistv5 – Published: 2026-08-19 19:18 – Updated: 2026-08-19 19:18
VLAI
Title
pfSense Plus/CE Stored XSS via Traffic Graphs PTR Record
Summary
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.
Severity
5.3 (Medium)
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
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version CPE status
Netgate pfSense Plus Affected: 0 , < 26.07 (custom)
guessed Create a notification for this product.
Netgate pfSense CE Affected: 0 , ≤ 2.8.1 (semver)
guessed Create a notification for this product.
Date Public
2026-08-13 00:00
Credits
BENDIB MOHAMED ANIS VulnCheck
Show details on NVD website
To clipboard 

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        }
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            "Recovery": "NOT_DEFINED",
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      "problemTypes": [
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          "descriptions": [
            {
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              "description": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
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        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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          "tags": [
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          "url": "https://docs.netgate.com/downloads/pfSense-SA-26_21.webgui.asc"
        },
        {
          "name": "Plus Release Notes",
          "tags": [
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          ],
          "url": "https://docs.netgate.com/pfsense/en/latest/releases/26-07.html"
        },
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          "name": "CE Release Notes",
          "tags": [
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          "url": "https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html"
        },
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      "source": {
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    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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    "datePublished": "2026-08-19T19:18:50.158Z",
    "dateReserved": "2026-07-28T16:06:49.773Z",
    "dateUpdated": "2026-08-19T19:18:50.158Z",
    "state": "PUBLISHED"
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.