Vulnerability Description
Nextcloud is an open source content collaboration platform. From versions 1.15.0 to before 1.15.4, 1.16.0 to before 1.16.3, 1.17.0 to before 1.17.1, and 1.18.0 to before 1.18.1, a malicious user with access to an end-to-end encrypted files drop link was able to also drop files into other end-to-end encrypted folders of the share owner. Reading and modifying of other files was not possible. This issue has been patched in versions 1.15.4, 1.16.3, 1.17.1, 1.18.1, and 2.0.0-rc.7.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/nextcloud/end_to_end_encryption/pull/1395
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-p3qw-7
- https://hackerone.com/reports/3304830
FAQ
What is CVE-2026-45159?
CVE-2026-45159 is a vulnerability with a CVSS score of 3.5 (LOW). Nextcloud is an open source content collaboration platform. From versions 1.15.0 to before 1.15.4, 1.16.0 to before 1.16.3, 1.17.0 to before 1.17.1, and 1.18.0 to before 1.18.1, a malicious user with ...
How severe is CVE-2026-45159?
CVE-2026-45159 has been rated LOW with a CVSS base score of 3.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45159?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.