CVE-2026-5474 NASA cFS CCSDS Packet Header to_lab_passthru_encode.c CFE_MSG_GetSize heap-based overflow
A heap-based buffer overflow in NASA cFS allows local network attackers to execute arbitrary code or cause denial of service via crafted CCSDS packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5474?
CVE-2026-5474 is a medium-severity memory corruption vulnerability in NASA cFS, published on 3 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in NASA cFS up to 7.0.0. This affects the function CFE_MSG_GetSize of the file apps/to_lab/fsw/src/to_lab_passthru_encode.c of the component CCSDS Packet Header Handler. Performing a manipulation results in heap-based buffer overflow. The attacker must have access to the local network to execute the attack. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-5474?
It affects 1 product.
Products include Nasa Core Flight System.
How do I fix CVE-2026-5474?
No fix has been published for CVE-2026-5474 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-2026-5474 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5474 exists.
Other vulnerabilities in NASA cFS
Sources
Also known as GHSA-43rr-mfcw-532v.