Vulnerability-Lookup

GHSA-23F6-W88J-75XF

Vulnerability from github – Published: 2026-10-14 03:30 – Updated: 2026-10-14 03:30

Details

Epic Games Unreal Engine versions up to and including 5.8.0 ship with an insecure default configuration for the LaunchURL Blueprint node (UKismetSystemLibrary::LaunchURL). The URL scheme filter (FURLRequestFilter) is empty by default, which permits all URL schemes. On Windows, this results in a call to ShellExecuteW() with the open verb, so a supplied file:/// URI causes the referenced file to be executed. Any Unreal Engine game that loads user-generated content containing Blueprints is vulnerable to command execution via a malicious local file or a remote file on a WebDAV share. This is an instance of CWE-1188 (Initialization of a Resource with an Insecure Default).

Severity

7.7 (High)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-14765"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1188"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-14T03:17:21Z",
    "severity": "HIGH"
  },
  "details": "Epic Games Unreal Engine versions up to and including 5.8.0 ship with an insecure default configuration for the LaunchURL Blueprint node (UKismetSystemLibrary::LaunchURL). The URL scheme filter (FURLRequestFilter) is empty by default, which permits all URL schemes. On Windows, this results in a call to ShellExecuteW() with the open verb, so a supplied file:/// URI causes the referenced file to be executed. Any Unreal Engine game that loads user-generated content containing Blueprints is vulnerable to command execution via a malicious local file or a remote file on a WebDAV share. This is an instance of CWE-1188 (Initialization of a Resource with an Insecure Default).",
  "id": "GHSA-23f6-w88j-75xf",
  "modified": "2026-10-14T03:30:39Z",
  "published": "2026-10-14T03:30:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-14765"
    },
    {
      "type": "WEB",
      "url": "https://khaelkugler.com/blogs/meccha_chameleon.html"
    },
    {
      "type": "WEB",
      "url": "https://takeonme.org/gcves/GCVE-1337-2026-00000000000000000000000000000000000000000000000001011111111101111111111110000000000000000000000000000000000000000000000000000001011"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-14765 (GCVE-0-2026-14765)

Vulnerability from cvelistv5 – Published: 2026-10-14 02:31 – Updated: 2026-10-14 02:31

Title

Epic Games Unreal Engine Insecure Default URL Scheme Allowance in LaunchURL

Summary

Severity

7.7 (High)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CNA · AHA (v2.0.3)

CWE

CWE-1188 - Initialization of a Resource with an Insecure Default

Assigner

AHA CNA under the mitre root

CNA scorecard C 73/100 over 14 records in the last 180 days details

References

2 references

URL	Tags
https://khaelkugler.com/blogs/meccha_chameleon.html	related
https://takeonme.org/gcves/GCVE-1337-2026-0000000…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Epic Games	Unreal Engine	Affected: 0 , ≤ 5.8.0 (semver)

Date Public

2026-10-14 02:00

Credits

Khael Kugler todb of AHA!

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Unreal Engine",
          "vendor": "Epic Games",
          "versions": [
            {
              "lessThanOrEqual": "5.8.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Khael Kugler"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "todb of AHA!"
        }
      ],
      "datePublic": "2026-10-14T02:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Epic Games Unreal Engine versions up to and including 5.8.0 ship with an insecure default configuration for the LaunchURL Blueprint node (UKismetSystemLibrary::LaunchURL). The URL scheme filter (FURLRequestFilter) is empty by default, which permits all URL schemes. On Windows, this results in a call to ShellExecuteW() with the open verb, so a supplied file:/// URI causes the referenced file to be executed. Any Unreal Engine game that loads user-generated content containing Blueprints is vulnerable to command execution via a malicious local file or a remote file on a WebDAV share. This is an instance of CWE-1188 (Initialization of a Resource with an Insecure Default)."
            }
          ],
          "value": "Epic Games Unreal Engine versions up to and including 5.8.0 ship with an insecure default configuration for the LaunchURL Blueprint node (UKismetSystemLibrary::LaunchURL). The URL scheme filter (FURLRequestFilter) is empty by default, which permits all URL schemes. On Windows, this results in a call to ShellExecuteW() with the open verb, so a supplied file:/// URI causes the referenced file to be executed. Any Unreal Engine game that loads user-generated content containing Blueprints is vulnerable to command execution via a malicious local file or a remote file on a WebDAV share. This is an instance of CWE-1188 (Initialization of a Resource with an Insecure Default)."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "other": {
            "content": {
              "options": [
                {
                  "Exploitation": "poc"
                },
                {
                  "Automatable": "yes"
                },
                {
                  "Technical Impact": "total"
                }
              ],
              "role": "CNA",
              "version": "2.0.3"
            },
            "type": "ssvc"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1188",
              "description": "CWE-1188 Initialization of a Resource with an Insecure Default",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-14T02:31:08.607Z",
        "orgId": "26969f82-7e87-44d8-9cb5-f6fb926ddd43",
        "shortName": "AHA"
      },
      "references": [
        {
          "tags": [
            "related"
          ],
          "url": "https://khaelkugler.com/blogs/meccha_chameleon.html"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://takeonme.org/gcves/GCVE-1337-2026-00000000000000000000000000000000000000000000000001011111111101111111111110000000000000000000000000000000000000000000000000000001011"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Epic Games Unreal Engine Insecure Default URL Scheme Allowance in LaunchURL",
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "26969f82-7e87-44d8-9cb5-f6fb926ddd43",
    "assignerShortName": "AHA",
    "cveId": "CVE-2026-14765",
    "datePublished": "2026-10-14T02:31:08.607Z",
    "dateReserved": "2026-07-04T17:45:14.357Z",
    "dateUpdated": "2026-10-14T02:31:08.607Z",
    "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.

Vulnerability timeline

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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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