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CVE-2026-77929

Estado: AplazadaAlta (8.7)—

ClipBucket v5 before 5.5.3-#182 contains a file upload vulnerability that allows authenticated users to achieve remote code execution by uploading a PHP file with valid image magic bytes through the photo upload endpoint. The FileUpload::manageFile() function in fileupload.class.php fails to update the file extension after MIME validation, allowing an attacker-controlled .php extension to persist on disk and execute as PHP via PHP-FPM when the uploaded file is retrieved.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad de carga de archivo en servicio remoto ClipBucket que requiere autenticación (PR:L). Permite RCE via web shell PHP persistente tras bypass MIME validation, explotando fallo en validación de extensión.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Disable or Remove Feature or ProgramVulnerability ScanningUser Account ManagementThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account Management

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Clipbucket — ClipbucketAI

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-77929",
  "cveTags": [],
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        "ssvcData": {
          "id": "CVE-2026-77929",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2026-09-18T15:26:44.912744Z"
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    "cvssMetricV31": [
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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    ],
    "cvssMetricV40": [
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        "cvssData": {
          "Safety": "NOT_DEFINED",
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          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
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          "valueDensity": "NOT_DEFINED",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
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      "affectedData": [
        {
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          "vendor": "MacWarrior",
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          "versions": [
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              "status": "affected",
              "version": "0",
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              "versionType": "custom"
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          "packageURL": "pkg:github/MacWarrior/clipbucket-v5",
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  "published": "2026-09-18T15:17:13.287",
  "references": [
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      "url": "https://github.com/MacWarrior/clipbucket-v5/commit/61cce55ab26ef88fb782dfde47b44c17c56978cd",
      "source": "disclosure@vulncheck.com"
    },
    {
      "url": "https://github.com/MacWarrior/clipbucket-v5/releases/tag/5.5.3-%23182",
      "source": "disclosure@vulncheck.com"
    },
    {
      "url": "https://www.vulncheck.com/advisories/clipbucket-remote-code-execution-via-photo-upload-endpoint",
      "source": "disclosure@vulncheck.com"
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      "value": "ClipBucket v5 before 5.5.3-#182 contains a file upload vulnerability that allows authenticated users to achieve remote code execution by uploading a PHP file with valid image magic bytes through the photo upload endpoint. The FileUpload::manageFile() function in fileupload.class.php fails to update the file extension after MIME validation, allowing an attacker-controlled .php extension to persist on disk and execute as PHP via PHP-FPM when the uploaded file is retrieved."
    }
  ],
  "lastModified": "2026-09-22T20:53:07.383",
  "sourceIdentifier": "disclosure@vulncheck.com"
}