CVE-2026-45154 Nextcloud: Improper Access Control in Collectives
Guests with view-only access can read deleted pages from the trashbin in Nextcloud Collectives, exposing sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-45154?
CVE-2026-45154 is a low-severity missing authorization vulnerability in nextcloud security-advisories, published on 1 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Nextcloud is an open source content collaboration platform. From version 2.6.0 to before version 4.3.0, when a previous collective pages was deleted and the collective was shared view-only, guests with access to the collective were able to access the deleted pages directly from the trashbin. This issue has been patched in version 4.3.0.
Weakness: CWE-284
Which versions are affected by CVE-2026-45154?
How do I fix CVE-2026-45154?
No fix has been published for CVE-2026-45154 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-45154 being exploited?
There is no known exploitation of CVE-2026-45154 in the wild and no public exploit code.
Sources
Also known as GHSA-8mpv-ggq8-hf3w.