CVE-2026-48711 SSHFS: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Attackers can execute arbitrary commands locally by injecting options into SSHFS mount sources when specific sftp_server configurations are used.
- 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-2026-48711?
CVE-2026-48711 is a high-severity command injection vulnerability in libfuse sshfs, published on 19 Aug 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
SSHFS is a network filesystem client for connecting to SSH servers. From version 1.4 until 3.7.6, SSHFS accepts a bracketed mount source such as [-oProxyCommand=CMD]:/path and find_base_path() removes the brackets, leaving a host value that begins with - and is passed directly to ssh as a command-line argument. When a caller also supplies a path-valued sftp_server, ssh treats the normalized host as an option and the server path as its destination, causing an injected ProxyCommand to execute locally before any connection or authentication succeeds. The attack requires a caller or wrapper that passes an attacker-controlled mount source to SSHFS with the required sftp_server configuration and results in arbitrary command execution as the user running SSHFS. This issue is fixed in version 3.7.6.
Weakness: CWE-88
Which versions are affected by CVE-2026-48711?
How do I fix CVE-2026-48711?
Upgrade to a fixed version.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-48711 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48711 exists.
Sources
Also known as ALPINE-CVE-2026-48711, AZL-97014, DEBIAN-CVE-2026-48711, GHSA-mm85-q63v-4476, UBUNTU-CVE-2026-48711.