CVE-2026-78547 Out-of-Bounds Write
An out-of-bounds write vulnerability in Citrix Workspace app for Windows allows attackers to execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-78547?
CVE-2026-78547 is a medium-severity memory corruption vulnerability in Citrix Workspace app for Windows, published on 11 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Out-of-bounds write vulnerability in Citrix Citrix Workspace app for Windows.
This issue affects Citrix Workspace app for Windows: before 2603.11 Current Release (CR), before 2507.1 LTSR CU3, and before LTSR 2607.
Weakness: CWE-787
Which versions are affected by CVE-2026-78547?
How do I fix CVE-2026-78547?
No fix has been published for CVE-2026-78547 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-78547 being exploited?
There is no known exploitation of CVE-2026-78547 in the wild and no public exploit code.
Sources
Also known as GHSA-cmf8-hqjg-89gj.