CVE-2026-100388 RustDesk before 1.5.0 Missing Authorization Check on Incoming File Clipboard Messages
Authenticated remote peers can bypass file transfer restrictions to place files on the host clipboard and retrieve copied contents.
- 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-2026-100388?
CVE-2026-100388 is a medium-severity missing authorization vulnerability in rustdesk, published on 25 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
RustDesk versions before 1.5.0 fail to properly validate file transfer permissions on incoming file clipboard messages in the Cliprdr message handler on Linux and macOS. Authenticated remote peers with disabled file transfer permissions can place files onto the host clipboard and retrieve copied files and contents from the process-wide clipboard cache.
Weakness: CWE-862
Which versions are affected by CVE-2026-100388?
How do I fix CVE-2026-100388?
No fix has been published for CVE-2026-100388 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-2026-100388 being exploited?
There is no known exploitation of CVE-2026-100388 in the wild and no public exploit code.
Sources
Also known as GHSA-mr3p-q22v-cr79.