CVE-2026-82980Any authenticated user can lock or unlock files they do not own by targeting absolute WebDAV paths of other users.
Updated under an hour ago ()
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It affects Nextcloud Files Lock. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Any authenticated user can lock or unlock files they do not own by targeting absolute WebDAV paths of other users. The DAV plugin resolves files from the absolute request URI without verifying that the path segment matches the authenticated session user. This enables: Cross-user manual locks : attacker locks a victim's files, blocking writes (PUT/MOVE/DELETE, editor saves). Lock-token disclosure: the app returns the lock token to unauthorized callers, enabling them to remove token-based locks (client locks) of other users.
- CVSS
- 6.3 MEDIUM (v3.0, CNA)CVSS:3.0/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
- hackerone
- NVD analysis
- Deferred
- Record last updated
- Sep 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Nextcloud Files Lock nextcloud:files_lock (from the name) | from 31.0.0 through 33.0.0 | CNA record |
References
- https://hackerone.com/reports/3301553
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.