CVE-2026-45282

Published Jun 1, 2026

Last updated a day ago

CVSS medium 6.5

Overview

Description: Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, an authenticated attacker can access attachments of link shares when knowing the share token, circumventing password protection or download restrictions. It is applicable to any file that is shared directly, as the attacker only needs to know a documentId they own, apart of the mentioned share token. For shared folders the attacker has to know or guess a documentId of a file that is included inside the folder, making it much harder to exploit. The attacker can only extract an attachments, but not the file shared file or folder itself. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9, 29.0.16.16, 28.0.14.17 or 27.1.11.5
Source: security-advisories@github.com
NVD status: Analyzed
Products: nextcloud_server

Risk scores

CVSS 3.1

Type: Secondary
Base score: 6.5
Impact score: 3.6
Exploitability score: 2.8
Vector string: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Severity: MEDIUM

Weaknesses

security-advisories@github.com: CWE-284
nvd@nist.gov: NVD-CWE-noinfo

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*",
            "matchCriteriaId": "A4E473E0-CAC5-4C49-AA6A-84E16C6EAA13",
            "versionEndExcluding": "32.0.9",
            "versionStartIncluding": "32.0.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*",
            "matchCriteriaId": "9B2B8E97-72E8-48AE-85F0-9FB5CE692F14",
            "versionEndExcluding": "33.0.3",
            "versionStartIncluding": "33.0.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  },
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
            "matchCriteriaId": "040ED682-7356-4D38-A688-0FC81D7109B8",
            "versionEndExcluding": "27.1.11.5",
            "versionStartIncluding": "27.0.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
            "matchCriteriaId": "F4136154-9B03-43BC-BD91-D57827E1BAE3",
            "versionEndExcluding": "28.0.14.17",
            "versionStartIncluding": "28.0.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
            "matchCriteriaId": "C98F45A0-2CF9-4534-8EEA-52AA5682DFA5",
            "versionEndExcluding": "29.0.16.16",
            "versionStartIncluding": "29.0.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
            "matchCriteriaId": "DA06C26B-C42D-4760-BE2D-F20749B36EF1",
            "versionEndExcluding": "30.0.17.9",
            "versionStartIncluding": "30.0.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
            "matchCriteriaId": "4FA400BC-693E-461C-B900-37D8ECA22407",
            "versionEndExcluding": "31.0.14.5",
            "versionStartIncluding": "31.0.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
            "matchCriteriaId": "E0868A4E-159B-40EC-9633-82B82E87ADA0",
            "versionEndExcluding": "32.0.9",
            "versionStartIncluding": "32.0.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
            "matchCriteriaId": "1AD6566B-8299-4BDD-9ADD-8259D0EE4245",
            "versionEndExcluding": "33.0.3",
            "versionStartIncluding": "33.0.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.

Overview

Risk scores

CVSS 3.1

Weaknesses

Social media

Configurations

Related CVEs

References