Vulnerability-Lookup

CVE-2026-50544 (GCVE-0-2026-50544)

Vulnerability from cvelistv5 – Published: 2026-08-12 23:18 – Updated: 2026-08-14 22:23

Title

NortheBridge/luminalshine has Incorrect Permission Assignment for Critical Resource and Creation of Temporary File in Directory with Insecure Permissions

Summary

NortheBridge/luminalshine is a Sunshine-compatible game stream host for Moonlight. Prior to version 26.05.0-rc4, a latent gap exists on a default install, the file at `src/platform/windows/misc.cpp` lives at `C:\ProgramData\LuminalShine\config\apps.json` and is created by the `SYSTEM` service. Under Windows' default `C:\ProgramData` inheritance, that gives `BUILTIN\Users` only Read+Execute — not writable — so the canonical EoP doesn't actually trigger on a vanilla install. Version 26.05.0-rc4 contains a patch for the issue. As a workaround, use default condition DACLs for `ProgramData`.

Severity

6.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 22:23 UTC

CWE

CWE-379 - Creation of Temporary File in Directory with Insecure Permissions
CWE-732 - Incorrect Permission Assignment for Critical Resource

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/NortheBridge/luminalshine/secu…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
NortheBridge	luminalshine	Affected: < 26.05.0-rc4	guessed

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-50544",
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FKIE_CVE-2026-50544

Vulnerability from fkie_nvd - Published: 2026-08-13 00:17 - Updated: 2026-09-09 21:02

Severity

6.3 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/NortheBridge/luminalshine/security/advisories/GHSA-52q6-5x97-2747

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "luminalshine",
          "vendor": "NortheBridge",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 26.05.0-rc4"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "NortheBridge/luminalshine is a Sunshine-compatible game stream host for Moonlight. Prior to version 26.05.0-rc4, a latent gap exists on a default install, the file at `src/platform/windows/misc.cpp` lives at `C:\\ProgramData\\LuminalShine\\config\\apps.json` and is created by the `SYSTEM` service. Under Windows\u0027 default `C:\\ProgramData` inheritance, that gives `BUILTIN\\Users` only Read+Execute \u2014 not writable \u2014 so the canonical EoP doesn\u0027t actually trigger on a vanilla install. Version 26.05.0-rc4 contains a patch for the issue. As a workaround, use default condition DACLs for `ProgramData`."
    }
  ],
  "id": "CVE-2026-50544",
  "lastModified": "2026-09-09T21:02:22.660",
  "metrics": {
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          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 6.3,
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
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        "impactScore": 5.9,
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        "type": "Secondary"
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    "ssvcV203": [
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          "version": "2.0.3"
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    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
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          "lang": "en",
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        },
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        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
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}

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.