ubuntu-cve-2026-47187
Vulnerability from osv_ubuntu
Published
2026-08-19 15:17
Modified
2026-09-02 16:18
Summary
Details
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.
Severity
9.3 (Critical)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "sshfs",
"binary_version": "2.5-1ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "sshfs-fuse",
"purl": "pkg:deb/ubuntu/sshfs-fuse@2.5-1ubuntu1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.5-1ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "sshfs",
"binary_version": "2.8-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "sshfs-fuse",
"purl": "pkg:deb/ubuntu/sshfs-fuse@2.8-1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.8-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "sshfs",
"binary_version": "3.6.0+repack+really2.10-0ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "sshfs-fuse",
"purl": "pkg:deb/ubuntu/sshfs-fuse@3.6.0+repack+really2.10-0ubuntu1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.10+repack-2",
"3.6.0+repack-1",
"3.6.0+repack+really2.10-0ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "sshfs",
"binary_version": "3.7.1+repack-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "sshfs-fuse",
"purl": "pkg:deb/ubuntu/sshfs-fuse@3.7.1+repack-2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.6.0+repack+really2.10-0ubuntu1",
"3.7.1+repack-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "sshfs",
"binary_version": "3.7.3-1.1build3"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "sshfs-fuse",
"purl": "pkg:deb/ubuntu/sshfs-fuse@3.7.3-1.1build3?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.7.3-1.1build1",
"3.7.3-1.1build2",
"3.7.3-1.1build3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "sshfs",
"binary_version": "3.7.3-1.1build4"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "sshfs-fuse",
"purl": "pkg:deb/ubuntu/sshfs-fuse@3.7.3-1.1build4?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.7.3-1.1build3",
"3.7.3-1.1build4"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "sshfs",
"binary_version": "3.7.3-1.1build5"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "sshfs-fuse",
"purl": "pkg:deb/ubuntu/sshfs-fuse@3.7.3-1.1build5?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.7.3-1.1build4",
"3.7.3-1.1build5"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2026-47187",
"modified": "2026-09-02T16:18:18Z",
"published": "2026-08-19T15:17:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-47187"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-47187"
},
{
"type": "REPORT",
"url": "https://www.openwall.com/lists/oss-security/2026/05/30/3"
},
{
"type": "REPORT",
"url": "https://github.com/libfuse/sshfs/security/advisories/GHSA-pjv6-2c3f-r357"
},
{
"type": "REPORT",
"url": "https://github.com/libfuse/sshfs/pull/361"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-47187"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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