FKIE_CVE-2026-45159

Vulnerability from fkie_nvd - Published: 2026-06-01 17:17 - Updated: 2026-07-22 07:10
Severity
3.5 (Low) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Summary
Nextcloud is an open source content collaboration platform. From versions 1.15.0 to before 1.15.4, 1.16.0 to before 1.16.3, 1.17.0 to before 1.17.1, and 1.18.0 to before 1.18.1, a malicious user with access to an end-to-end encrypted files drop link was able to also drop files into other end-to-end encrypted folders of the share owner. Reading and modifying of other files was not possible. This issue has been patched in versions 1.15.4, 1.16.3, 1.17.1, 1.18.1, and 2.0.0-rc.7.
References
security-advisories@github.comhttps://github.com/nextcloud/end_to_end_encryption/pull/1395
security-advisories@github.comhttps://github.com/nextcloud/security-advisories/security/advisories/GHSA-p3qw-7gwx-wg24
security-advisories@github.comhttps://hackerone.com/reports/3304830
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "security-advisories",
          "vendor": "nextcloud",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.15.0, \u003c 1.15.4"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.16.0, \u003c 1.16.3"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.17.0, \u003c 1.17.1"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.18.0, \u003c 1.18.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Nextcloud is an open source content collaboration platform. From versions 1.15.0 to before 1.15.4, 1.16.0 to before 1.16.3, 1.17.0 to before 1.17.1, and 1.18.0 to before 1.18.1, a malicious user with access to an end-to-end encrypted files drop link was able to also drop files into other end-to-end encrypted folders of the share owner. Reading and modifying of other files was not possible. This issue has been patched in versions 1.15.4, 1.16.3, 1.17.1, 1.18.1, and 2.0.0-rc.7."
    },
    {
      "lang": "es",
      "value": "Nextcloud es una plataforma de colaboraci\u00f3n de contenido de c\u00f3digo abierto. Desde las versiones 1.15.0 hasta antes de la 1.15.4, de la 1.16.0 hasta antes de la 1.16.3, de la 1.17.0 hasta antes de la 1.17.1, y de la 1.18.0 hasta antes de la 1.18.1, un usuario malicioso con acceso a un enlace de carga de archivos cifrados de extremo a extremo pudo tambi\u00e9n cargar archivos en otras carpetas cifradas de extremo a extremo del propietario del recurso compartido. La lectura y modificaci\u00f3n de otros archivos no fue posible. Este problema ha sido parcheado en las versiones 1.15.4, 1.16.3, 1.17.1, 1.18.1 y 2.0.0-rc.7."
    }
  ],
  "id": "CVE-2026-45159",
  "lastModified": "2026-07-22T07:10:00.107",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.5,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-45159",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-01T19:30:14.088508Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-01T17:17:09.550",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nextcloud/end_to_end_encryption/pull/1395"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-p3qw-7gwx-wg24"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://hackerone.com/reports/3304830"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ],
      "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

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.