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Vulnerability · Published Aug 19, 2026 · Assigned by GitHub_M

CVE-2026-47187SSHFS Symlink Escape: Rogue SFTP Server → Local File Read/Write

Critical 9.3

In plain English

A critical-severity security flaw in sshfs from libfuse. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.3Critical
Exploit odds (30 days)0.5%top 57.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20sshfs3.7.6-r0ALPINE-CVE-2026-47187
Alpine:v3.21sshfs3.7.6-r0ALPINE-CVE-2026-47187
Alpine:v3.22sshfs3.7.6-r0ALPINE-CVE-2026-47187
Alpine:v3.23sshfs3.7.6-r0ALPINE-CVE-2026-47187
Alpine:v3.24sshfs3.7.6-r0ALPINE-CVE-2026-47187
Debian:12sshfs-fuse3.7.3-1.2~deb12u1DEBIAN-CVE-2026-47187
Debian:13sshfs-fuse3.7.3-1.2~deb13u1DEBIAN-CVE-2026-47187
Debian:14sshfs-fuse3.7.3-1.2DEBIAN-CVE-2026-47187
Ubuntu:22.04:LTSsshfs-fuseno fix listedUBUNTU-CVE-2026-47187
Ubuntu:24.04:LTSsshfs-fuseno fix listedUBUNTU-CVE-2026-47187
Ubuntu:25.10sshfs-fuseno fix listedUBUNTU-CVE-2026-47187
Ubuntu:26.04:LTSsshfs-fuseno fix listedUBUNTU-CVE-2026-47187
Ubuntu:26.10sshfs-fuseno fix listedUBUNTU-CVE-2026-47187

Affected products (as reported)

VendorProductVersions
libfuse sshfs < 3.7.6

Weakness: CWE-59 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

References