Vulnerability-Lookup

GHSA-GFRQ-49J2-VMV3

Vulnerability from github – Published: 2026-08-19 21:30 – Updated: 2026-08-19 21:30

Details

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

6.1 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-67189"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-19T20:17:20Z",
    "severity": "MODERATE"
  },
  "details": "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\u0027s 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.",
  "id": "GHSA-gfrq-49j2-vmv3",
  "modified": "2026-08-19T21:30:36Z",
  "published": "2026-08-19T21:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-67189"
    },
    {
      "type": "WEB",
      "url": "https://docs.netgate.com/downloads/pfSense-SA-26_21.webgui.asc"
    },
    {
      "type": "WEB",
      "url": "https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html"
    },
    {
      "type": "WEB",
      "url": "https://docs.netgate.com/pfsense/en/latest/releases/26-07.html"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/pfsense-plus-ce-stored-xss-via-traffic-graphs-ptr-record"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-08-19 19:18 – Updated: 2026-08-25 13:56

Title

pfSense Plus/CE Stored XSS via Traffic Graphs PTR Record

Summary

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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-25 13:56 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://docs.netgate.com/downloads/pfSense-SA-26_…	vendor-advisory
https://docs.netgate.com/pfsense/en/latest/releas…	release-notes
https://docs.netgate.com/pfsense/en/latest/releas…	release-notes
https://www.vulncheck.com/advisories/pfsense-plus…	third-party-advisory

Impacted products

2 products

Vendor	Product	Version
Netgate	pfSense Plus	Affected: 0 , < 26.07 (custom)
Netgate	pfSense CE	Affected: 0 , ≤ 2.8.1 (semver)

Date Public

2026-08-13 00:00

Credits

BENDIB MOHAMED ANIS VulnCheck

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-67189",
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-25T13:56:12.060805Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-25T13:56:21.621Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "defaultStatus": "affected",
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          "vendor": "Netgate",
          "versions": [
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              "lessThan": "26.07",
              "status": "affected",
              "version": "0",
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            }
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        },
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          "product": "pfSense CE",
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              "lessThanOrEqual": "2.8.1",
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              "versionType": "semver"
            }
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          "type": "finder",
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      ],
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        }
      ],
      "metrics": [
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            "Recovery": "NOT_DEFINED",
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            "baseScore": 5.3,
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            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
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            "valueDensity": "NOT_DEFINED",
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
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        },
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        },
        {
          "name": "CE Release Notes",
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          ],
          "url": "https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html"
        },
        {
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  "cveMetadata": {
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    "assignerShortName": "VulnCheck",
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    "datePublished": "2026-08-19T19:18:50.158Z",
    "dateReserved": "2026-07-28T16:06:49.773Z",
    "dateUpdated": "2026-08-25T13:56:21.621Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.