CVE-2026-78299 Path traversal in Eclipse Embedded CDT (C/C++ Development Tools)
Attackers can write arbitrary files outside the intended directory via compromised CMSIS packs, potentially leading to code execution or data modification.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-78299?
CVE-2026-78299 is a critical path traversal vulnerability in Eclipse Embedded CDT (C/C++ Development Tools), published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Eclipse Embedded CDT versions 6.0 to 6.7 if the CMSIS-Pack archive extracts a compromised CMSIS pack the archive extraction can extract files to locations outside of the pack, allowing writing of arbitrary files to other locations on disk.
Weakness: CWE-22
Which versions are affected by CVE-2026-78299?
How do I fix CVE-2026-78299?
No fix has been published for CVE-2026-78299 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-78299 being exploited?
There is no known exploitation of CVE-2026-78299 in the wild and no public exploit code.
Sources
Also known as GHSA-24hx-44cp-gqfx, GHSA-qch4-8rmp-mjx3.