CVE-2026-109965 Serena before 2.0.0 Symlink Following in File Tools Allows Access Outside Project Root
Attackers can read or overwrite sensitive files outside the project root by committing symlinks, exposing SSH keys and credentials.
- 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
- None listed
What is CVE-2026-109965?
CVE-2026-109965 is a high-severity path traversal vulnerability in oraios serena, published on 13 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
Serena before 2.0.0 contains an improper link resolution vulnerability that allows attackers to access files outside the project root by committing symlinks inside a repository. Project.is_path_in_project() normalizes paths lexically without resolving symlinks, so file tools like read_file and create_text_file can read or overwrite files such as SSH keys or cloud credentials.
Weakness: CWE-59
Which versions are affected by CVE-2026-109965?
How do I fix CVE-2026-109965?
No fix has been published for CVE-2026-109965 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-2026-109965 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109965 exists.
Sources
Also known as GHSA-f7x4-jgqg-5mc6.