FKIE_CVE-2026-45264

Vulnerability from fkie_nvd - Published: 2026-06-01 17:17 - Updated: 2026-07-22 07:10
Severity
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Summary
Nextcloud is an open source content collaboration platform. From versions 17.0.0 to before 17.0.15, 18.0.0 to before 18.1.12, 19.0.0 to before 19.1.16, 20.0.0 to before 20.1.11, and 21.0.0 to before 21.0.4, a user with READ and CREATE permission, but no UPDATE permission for a team folder can rename files in the team folder. This issue has been patched in versions 17.0.15, 18.1.12, 19.1.16, 20.1.11, and 21.0.4.
References
security-advisories@github.comhttps://github.com/nextcloud/groupfolders/pull/4361
security-advisories@github.comhttps://github.com/nextcloud/security-advisories/security/advisories/GHSA-wx2x-822r-rvmf
security-advisories@github.comhttps://hackerone.com/reports/3540673
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "security-advisories",
          "vendor": "nextcloud",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 17.0.0, \u003c 17.0.15"
            },
            {
              "status": "affected",
              "version": "\u003e= 18.0.0, \u003c 18.1.12"
            },
            {
              "status": "affected",
              "version": "\u003e= 19.0.0, \u003c 19.1.16"
            },
            {
              "status": "affected",
              "version": "\u003e= 20.0.0, \u003c 20.1.11"
            },
            {
              "status": "affected",
              "version": "\u003e= 21.0.0, \u003c 21.0.4"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Nextcloud is an open source content collaboration platform. From versions 17.0.0 to before 17.0.15, 18.0.0 to before 18.1.12, 19.0.0 to before 19.1.16, 20.0.0 to before 20.1.11, and 21.0.0 to before 21.0.4, a user with READ and CREATE permission, but no UPDATE permission for a team folder can rename files in the team folder. This issue has been patched in versions 17.0.15, 18.1.12, 19.1.16, 20.1.11, and 21.0.4."
    },
    {
      "lang": "es",
      "value": "Nextcloud es una plataforma de colaboraci\u00f3n de contenido de c\u00f3digo abierto. Desde las versiones 17.0.0 hasta antes de la 17.0.15, de la 18.0.0 hasta antes de la 18.1.12, de la 19.0.0 hasta antes de la 19.1.16, de la 20.0.0 hasta antes de la 20.1.11, y de la 21.0.0 hasta antes de la 21.0.4, un usuario con permiso de LECTURA y CREACI\u00d3N, pero sin permiso de ACTUALIZACI\u00d3N para una carpeta de equipo, puede renombrar archivos en dicha carpeta de equipo. Este problema ha sido parcheado en las versiones 17.0.15, 18.1.12, 19.1.16, 20.1.11 y 21.0.4."
    }
  ],
  "id": "CVE-2026-45264",
  "lastModified": "2026-07-22T07:10:00.107",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-45264",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-01T17:47:35.907468Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-01T17:17:09.690",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nextcloud/groupfolders/pull/4361"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wx2x-822r-rvmf"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://hackerone.com/reports/3540673"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.


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