libfuse Sshfs up to 3.7.5 sshfs.c sshfs_readlink symlink

Summaryinfo

A vulnerability labeled as critical has been found in libfuse Sshfs up to 3.7.5. Affected by this issue is the function sshfs_readlink of the file sshfs.c. Executing a manipulation can lead to symlink. This vulnerability is registered as CVE-2026-47187. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as critical was found in libfuse Sshfs up to 3.7.5. This vulnerability affects the function sshfs_readlink of the file sshfs.c. The manipulation with an unknown input leads to a symlink vulnerability. The CWE definition for the vulnerability is CWE-61. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

SSHFS is a network filesystem client for connecting to SSH servers. Prior to version 3.7.6, a rogue SFTP server can return absolute symlink targets or relative targets containing parent-directory components that SSHFS passes through FUSE for resolution by the client kernel against the local filesystem. The documented transform_symlinks mitigation does not contain relative targets because transform_symlink() returns early at sshfs.c:2181, while sshfs_readlink() at sshfs.c:2234 to sshfs.c:2236 otherwise copies the server-supplied link target to the kernel. A victim or victim-side tool that follows such a link through ordinary operations such as cp, rsync, backup tooling, or an editor can disclose readable local files back to the server or write server-controlled content to writable local files, potentially including startup or scheduled-task files. This issue is fixed in version 3.7.6.

The advisory is available at github.com. This vulnerability was named CVE-2026-47187 since 05/19/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 3.7.6 eliminates this vulnerability.

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Productinfo

Vendor

• libfuse

Name

• Sshfs

Version

• 3.7.0
• 3.7.1
• 3.7.2
• 3.7.3
• 3.7.4
• 3.7.5

Website

• Product: https://github.com/libfuse/sshfs/

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