CVE-2026-45159
Low
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.
SeverityLow
CVSS3.5
Exploit probability—
Product
Nextcloud Security-advisories
PublishedJun 1, 2026
First seenJun 1, 2026
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nextcloud security-advisories | >= 1.15.0, < 1.15.4, >= 1.16.0, < 1.16.3, >= 1.17.0, < 1.17.1, >= 1.18.0, < 1.18.1 | — |
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