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Fencer Intel
critical 9.3

CVE-2026-47187 json

SSHFS Symlink Escape: Rogue SFTP Server → Local File Read/Write

published 5mo ago modified 2mo ago also EUVD-2026-62493 , GHSA-pjv6-2c3f-r357

Unreviewed: the maintainers' own advisory

Published by the maintainers on their GitHub repository libfuse/sshfs. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.

cvss
9.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

Summary

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.

Patch / fix

  • sshfs-fuse Debian 12 3.7.3-1.2~deb12u1
  • sshfs-fuse Debian 13 3.7.3-1.2~deb13u1
  • sshfs-fuse Debian 14 3.7.3-1.2

debian advisories DEBIAN-CVE-2026-47187

  • sshfs openSUSE Tumbleweed 3.7.6-1.1

opensuse advisories openSUSE-SU-2026:10952-1

  • sshfs Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 3.7.6-r0

alpine advisories ALPINE-CVE-2026-47187

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2026-47187 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-47187 updated cvss 9.3

sshfs: SSHFS Symlink Escape: Rogue SFTP Server → Local File Read/Write

  • Red Hat Enterprise Linux 8 fuse-sshfs
    affected: workaround, no fix planned “Out of support scope”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
2mo ago

Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 9.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Affected products

  • libfuse sshfs

Classification

Weakness
  • CWE-59 Improper Link Resolution Before File Access

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of libfuse/sshfs published their own advisory on GitHub. Reviewed sources take precedence over it.