CVE-2026-109249 FreeRDP 3.0.0 before 3.32.0 Heap Out-of-Bounds Read via Remote Assistance File Parsing
Attackers can crash the FreeRDP client by providing a crafted invitation file, causing a heap out-of-bounds read during parsing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-109249?
CVE-2026-109249 is a medium-severity memory corruption vulnerability in FreeRDP, published on 12 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
FreeRDP 3.0.0 before 3.32.0 contains a heap out-of-bounds read in freerdp_assistance_parse_all_elements_of() because it advances its parsing cursor without reducing the remaining length, letting the scan window exceed the decrypted ConnectionString2 buffer. Attackers can supply a crafted .msrcIncident invitation file and password that crash xfreerdp when opened, before any RDP connection.
Weakness: CWE-125
Which versions are affected by CVE-2026-109249?
How do I fix CVE-2026-109249?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-109249 being exploited?
There is no known exploitation of CVE-2026-109249 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-109249, GHSA-gvq8-v2fm-ffxv, GHSA-jp53-9rp8-7w3q, UBUNTU-CVE-2026-109249.