CVE-2026-45279

Nextcloud: Limited path traversal via template API if using `{lang}` in config

CVSS 4.4 MEDIUMEPSS 0.4%CWE-22

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.4EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

01 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 31.0.0 to before 31.0.14, and 32.0.0 to before 32.0.4, if {lang} is used in the template directory config value, non-admin users can in some cases copy arbitrary files (depending on unix permissions) into their own Nextcloud directory via a path traversal. It is recommended that the Nextcloud Server is upgraded to 32.0.4, 31.0.14. It is recommended that the Nextcloud Enterprise Server is upgraded to 32.0.4, 31.0.14, 30.0.17.7, 29.0.17.12, 28.0.14.15

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N

Affected products

nextcloud · security-advisories

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References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j33j-qph5-4wch https://github.com/nextcloud/server/pull/57414/files https://hackerone.com/reports/3468140