CVE-2026-45275 Nextcloud: Authorization bypass in approval feature allows unauthorized file sharing with approvers
Attackers can bypass sharing restrictions to force file distribution to approvers, leading to unauthorized data access and privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-45275?
CVE-2026-45275 is a medium-severity missing authorization vulnerability in nextcloud security-advisories, published on 1 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, a privilege escalation vulnerability exists in the Approval app that allows a user without sharing permissions to force the system to share a file with approvers. This results in an authorization bypass and privilege escalation, allowing unauthorized distribution of restricted files. This issue has been patched in version 2.7.2.
Weakness: CWE-285
Which versions are affected by CVE-2026-45275?
It affects 1 product.
Products include Nextcloud Approval.
How do I fix CVE-2026-45275?
No fix has been published for CVE-2026-45275 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-2026-45275 being exploited?
There is no known exploitation of CVE-2026-45275 in the wild and no public exploit code.
Other vulnerabilities in nextcloud security-advisories
Sources
Also known as GHSA-v8q8-w6c3-3gv9.