CVE-2026-45283

[Catalogue CVE]

A flaw was found in Nextcloud Server. An authenticated user could exploit this vulnerability to lock or unlock files belonging to other users by manipulating WebDAV (Web Distributed Authoring and Versioning) paths. This issue also led to the disclosure of lock tokens in error responses, potentially allowing attackers to remove locks set by legitimate users. The consequences include unauthorized file modification and a potential denial of service. Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Gravité

Medium · CVSS 6.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Published

May 11, 2026, 10:00:00 PM UTC

Source

[NVD] · [CVE record]

EPSS

0.21% · Oct 27, 2026

{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "nextcloud_server",
      "fixed_version": "32.0.2",
      "applicability_unknown": true
    },
    {
      "name": "nextcloud_server",
      "fixed_version": "33.0.1",
      "applicability_unknown": true
    },
    {
      "name": "nextcloud_server",
      "fixed_version": "31.0.14.4",
      "applicability_unknown": true
    }
  ]
}