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

Quick assessment

Affected
libfuse sshfs
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SSHFS 是一个用于连接 SSH 服务器的网络文件系统客户端。从版本 1.4 到 3.7.6，SSHFS 允许使用带括号的挂载源（例如 ），而 函数会移除括号，使得主机值以 开头，并直接作为命令行参数传递给 ssh 命令。当调用者同时提供路径值的 sftp_server 时，ssh 会将规范化后的主机名视为选项，而将服务器路径作为其目标，从而导致注入的 ProxyCommand 在任何连接或认证成功之前就在本地执行。该攻击需要调用者或包装器将攻击者控制的挂载源传递给 SSHFS，并配置所需的 sftp_serve

CVSS 7.0 · High EPSS 0.20% · P10

Affected Version Matrix 1

VendorProduct Version RangeStatus
libfuse sshfs < 3.7.6 affected
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I. Basic Information for CVE-2026-48711

Vulnerability Information
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Vulnerability Title
SSHFS: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
参数注入或修改
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
libfuse sshfs < 3.7.6 -

II. Public POCs for CVE-2026-48711

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 14420 chars
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III. Intelligence Information for CVE-2026-48711

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Patches & Fixes for CVE-2026-48711 (2)

Vendor Advisories for CVE-2026-48711 (1)

Vendor Pages for CVE-2026-48711 (1)

IV. Related Vulnerabilities

Same product: sshfs
Same vendor: libfuse
Same weakness: CWE-88

V. Comments for CVE-2026-48711

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