CVE-2026-45283Nextcloud: Files Lock app allows users to lock and unlock files of other users
Updated under an hour ago ()
Does this affect you?
It affects nextcloud security-advisories and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.2, and 33.0.0 to before 33.0.1, the files_lock app did not properly validate the ownership of files when processing DAV lock and unlock requests. An authenticated user could lock or unlock files belonging to other users by targeting their absolute WebDAV paths. Additionally, lock tokens were disclosed to unauthorized callers in error responses, allowing attackers to remove token-based locks placed by other users' client applications. It is recommended that the Nextcloud Server is upgraded to 32.0.2 or 33.0.1. It is recommended that the Nextcloud Enterprise Server is upgraded to 31.0.14.4 or 32.0.2 or 33.0.1
- CVSS
- 6.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
- Weakness (CWE)
- CWE-287
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Jun 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
nextcloud security-advisories nextcloud:security_advisories (from the name) | from 32.0.0, < 32.0.2; from 33.0.0, < 33.0.1 | CNA record |
nextcloud nextcloud_server nextcloud:nextcloud_server | from 32.0.0 before 32.0.2; from 33.0.0 before 33.0.1; from 31.0.0 before 31.0.14.4; from 32.0.0 before 32.0.2; from 33.0.0 before 33.0.1 | NVD |
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4chh-6mhf-p4jjx-refsource-confirm, vendor-advisory
- https://github.com/nextcloud/files_lock/pull/1007x-refsource-misc, issue-tracking, patch
- https://hackerone.com/reports/3301553#x-refsource-misc, permissions-required
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.