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Medium severity6.3NVD Advisory· Published Jun 1, 2026· Updated Jun 3, 2026

CVE-2026-45283

CVE-2026-45283

Description

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

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

5
  • Nextcloud/Files Lockreferences2 versions
    (expand)+ 1 more
    • (no CPE)
    • (no CPE)range: 32.0.0 to <32.0.2, 33.0.0 to <33.0.1
  • Nextcloud/Server2 versions
    cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*+ 1 more
    • cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*range: >=32.0.0,<32.0.2
    • cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*range: >=31.0.0,<31.0.14.4
  • Nextcloud/Nextcloud Enterprise Serverllm-fuzzy
    Range: 32.0.0 to <32.0.2, 33.0.0 to <33.0.1

Patches

Vulnerability mechanics

References

3

News mentions

1