Vulnerability-Lookup

GHSA-G53H-C489-2F5M

Vulnerability from github – Published: 2026-09-23 21:30 – Updated: 2026-09-23 21:30

Details

An address bar spoofing issue in affected versions of Arc could allow an attacker to spoof the browser address bar via a element that triggers requestFullscreen without displaying the fullscreen notification.

Severity

7.4 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-94181"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-451"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-23T19:19:48Z",
    "severity": "HIGH"
  },
  "details": "An address bar spoofing issue in affected versions of Arc could allow an attacker to spoof the browser address bar via a \u003cselect\u003e element that triggers requestFullscreen without displaying the fullscreen notification.",
  "id": "GHSA-g53h-c489-2f5m",
  "modified": "2026-09-23T21:30:47Z",
  "published": "2026-09-23T21:30:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-94181"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/3711701"
    },
    {
      "type": "WEB",
      "url": "https://arc.net/security/bulletins#cve-2026-94181-address-bar-spoof-risk-missing-fullscreen-notification-via-select-element"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-94181 (GCVE-0-2026-94181)

Vulnerability from cvelistv5 – Published: 2026-09-23 18:55 – Updated: 2026-09-23 19:35

Title

Address Bar Spoof Risk; Missing Fullscreen Notification via Select Element

Summary

An address bar spoofing issue in affected versions of Arc could allow an attacker to spoof the browser address bar via a <select> element that triggers requestFullscreen without displaying the fullscreen notification.

Severity

7.4 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-23 19:35 UTC

CWE

CWE-451 - User Interface (UI) Misrepresentation of Critical Information

Assigner

BCNY mitre root Scorecard

References

2 references

URL	Tags
https://hackerone.com/reports/3711701
https://arc.net/security/bulletins#cve-2026-94181…

Impacted products

1 product

Vendor	Product	Version
The Browser Company of New York	Arc	Affected: 0 , < 1.159.0 (semver)

Date Public

2026-09-23 18:48

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JSON

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  "containers": {
    "adp": [
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        "metrics": [
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            "other": {
              "content": {
                "id": "CVE-2026-94181",
                "options": [
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                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-23T19:35:29.822010Z",
                "version": "2.0.3"
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              "type": "ssvc"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
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          "defaultStatus": "unaffected",
          "platforms": [
            "MacOS"
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          "product": "Arc",
          "vendor": "The Browser Company of New York",
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              "version": "0",
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      ],
      "datePublic": "2026-09-23T18:48:00.000Z",
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            }
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      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
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        "dateUpdated": "2026-09-23T18:55:08.973Z",
        "orgId": "59469e6c-7ea7-446f-8e43-06aa32c115e8",
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          "url": "https://hackerone.com/reports/3711701"
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        {
          "url": "https://arc.net/security/bulletins#cve-2026-94181-address-bar-spoof-risk-missing-fullscreen-notification-via-select-element"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
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      "title": "Address Bar Spoof Risk; Missing Fullscreen Notification via Select Element",
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    "datePublished": "2026-09-23T18:55:08.973Z",
    "dateReserved": "2026-09-21T00:50:04.410Z",
    "dateUpdated": "2026-09-23T19:35:35.801Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.
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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.

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.
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GHSA-G53H-C489-2F5M

CVE-2026-94181 (GCVE-0-2026-94181)

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