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CVE-2026-48711

SSHFS: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

7.0 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.24%Up 0.2 points since Jun 12, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.0

SSHFS: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

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.

Record
CVE-2026-48711
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-88
Updated
2026-11-02
EUVDEUVD-2026-62494 7.0

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.

Record
EUVD-2026-62494
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
NVD 7.0

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.

Record
CVE-2026-48711
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-88
Updated
2026-11-02
OSVALPINE-CVE-2026-48711 7.0

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.

Record
ALPINE-CVE-2026-48711
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSV 7.0

SSHFS: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

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.

Record
CVE-2026-48711
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-88
Updated
2026-11-02
OSVDEBIAN-CVE-2026-48711 7.0

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.

Record
DEBIAN-CVE-2026-48711
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVUBUNTU-CVE-2026-48711 7.0

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.

Record
UBUNTU-CVE-2026-48711
CVSS 3.1
7.0 HighCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVAZL-97014 No score

CVE-2026-48711 affecting package fuse-sshfs 3.7.3-1

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.

Record
AZL-97014
Updated
2026-11-05
OSVopenSUSE-SU-2026:10952-1 No score

sshfs-3.7.6-1.1 on GA media

These are all security issues fixed in the sshfs-3.7.6-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:10952-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:20915-1 No score

Security update for sshfs

This update for sshfs fixes the following issues:

Changes in sshfs:

  • Update to 3.7.6:

    • Added new maintainer: abhinavagarwal07 Abhinav Agarwal
    • CVE-2026-47187: Fixed critical vulnerability - Symlink Escape: Rogue SFTP Server to Local File Read/Write), credit to abhinavagarwal07 (bsc#1267017)
    • New -o contain_symlinks and -o no_contain_symlinks to control symlink containment behavior
    • CVE-2026-48711: Fixed high severity vulnerability - Improper Neutralization of Argument Delimiters in a Command ('Argument Injection'), credit to abhinavagarwal07 (bsc#1267016)
    • Fixed null-deref warning in tokenize_on_space, promote strict-warnings to required
    • Added a number of tests in CI, including rename, chmod, fsync, statvfs values, error paths, option coverage
    • Fixed malformed SFTP reply handling

  • Update to 3.7.5:

    • Implement connect to vsock
    • use latest major version for actions/checkout
    • Fix memleak in cache after readlink
    • Fill stat info when returning cached data for readdir
    • ipv6 support for directport connection

  • reverts to original fork

  • Don't globstar files in shared directory _bindir.

  • build the man page

Record
openSUSE-SU-2026:20915-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
sshfs
Alpine:v3.20
 before 3.7.6-r0
3.7.6-r0
sshfs
Alpine:v3.21
 before 3.7.6-r0
3.7.6-r0
sshfs
Alpine:v3.22
 before 3.7.6-r0
3.7.6-r0
sshfs
Alpine:v3.23
 before 3.7.6-r0
3.7.6-r0
sshfs
Alpine:v3.24
 before 3.7.6-r0
3.7.6-r0
fuse-sshfs
Azure Linux:3
 through 3.7.3-1 None known
sshfs-fuse
Debian:12
 before 3.7.3-1.2~deb12u1, plus listed versions
3.7.3-1.1
3.7.3-1.2~deb12u1
sshfs-fuse
Debian:13
 before 3.7.3-1.2~deb13u1, plus listed versions
3.7.3-1.13.7.3-1.2~deb12u1
3.7.3-1.2~deb13u1
sshfs-fuse
Debian:14
 before 3.7.3-1.2, plus listed versions
3.7.3-1.13.7.3-1.2~deb12u13.7.3-1.2~deb13u1
3.7.3-1.2
sshfs-fuse
Ubuntu:16.04:LTS
 All versions, plus listed versions
2.5-1ubuntu1
 None known
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Affected packages
PackageAffectedFixed
sshfs-fuse
Ubuntu:18.04:LTS
 All versions, plus listed versions
2.8-1
 None known
sshfs-fuse
Ubuntu:20.04:LTS
 All versions, plus listed versions
2.10+repack-23.6.0+repack-13.6.0+repack+really2.10-0ubuntu1
 None known
sshfs-fuse
Ubuntu:22.04:LTS
 All versions, plus listed versions
3.6.0+repack+really2.10-0ubuntu13.7.1+repack-2
 None known
sshfs-fuse
Ubuntu:24.04:LTS
 All versions, plus listed versions
3.7.3-1.1build13.7.3-1.1build23.7.3-1.1build3
 None known
sshfs-fuse
Ubuntu:25.10
 All versions, plus listed versions
3.7.3-1.1build33.7.3-1.1build4
 None known
sshfs-fuse
Ubuntu:26.10
 All versions, plus listed versions
3.7.3-1.1build53.7.3-1.2
 None known
sshfs-fuse
Ubuntu:26.04:LTS
 All versions, plus listed versions
3.7.3-1.1build43.7.3-1.1build5
 None known
sshfs
openSUSE:Tumbleweed
From an advisory covering 2 CVEs
 before 3.7.6-1.1
3.7.6-1.1

History

History
RecordedChangedSources
affected
factsOSV
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-48711 is a high vulnerability (CVSS 7.0) in Libfuse Sshfs, published June 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.24%, the 14th percentile. Fixed in sshfs 3.7.6-r0.

References

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