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Vulnerability record · CVE-2026-48711 · published 19 August 2026

CVE-2026-48711: Argument injection vulnerability

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.

7.0 CVSS 3.1 High EPSS 0.24% · top 86.8% CWE-88 · Argument injection Deferred
7.0CVSS 3.1 base score
0.24%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
9 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/libfuse/sshfs/commit/29bb565ea6405e2dd5a0ea65fe64da117e76055e
https://github.com/libfuse/sshfs/pull/362
https://github.com/libfuse/sshfs/releases/tag/sshfs-3.7.6
https://github.com/libfuse/sshfs/security/advisories/GHSA-mm85-q63v-4476

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Source: NIST National Vulnerability Database (record CVE-2026-48711), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.