UBUNTU-CVE-2026-88018

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Source
https://ubuntu.com/security/CVE-2026-88018
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88018.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-88018
Upstream
Withdrawn
2026-09-24T10:39:27Z
Published
2026-09-10T16:18:00Z
Modified
2026-09-24T13:02:03Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.1, rclone serve s3 configured with --auth-proxy but without --auth-key allows authPairMiddleware to register any client-chosen accessKeyID with an empty ws.s3Secret. gofakes3 then verifies the request’s SigV4 signature against that same empty secret, while Server.auth passes the access key identifier as both the user and authentication value to the proxy without an independent per-identity secret. An unauthenticated network attacker can therefore choose an arbitrary access key, sign with an empty secret, and reach whatever backend the auth-proxy script resolves for that identity. This issue is fixed in version 1.75.1.

References

Affected packages

Ubuntu:18.04:LTS / rclone

Package

Name
rclone
Purl
pkg:deb/ubuntu/rclone?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.36-3
1.36-3ubuntu0.1
1.36-3ubuntu0.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-ncw-rclone-dev",
            "binary_version": "1.36-3ubuntu0.2"
        },
        {
            "binary_name": "rclone",
            "binary_version": "1.36-3ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88018.json"

Ubuntu:Pro:20.04:LTS / rclone

Package

Name
rclone
Purl
pkg:deb/ubuntu/rclone?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.47.0+ex1-6
1.47.0+ex1-7
1.49.5-2
1.49.5-3
1.50.2-2
1.50.2-2ubuntu0.1
1.50.2-2ubuntu0.2
1.50.2-2ubuntu0.2+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-rclone-rclone-dev",
            "binary_version": "1.50.2-2ubuntu0.2+esm1"
        },
        {
            "binary_name": "rclone",
            "binary_version": "1.50.2-2ubuntu0.2+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88018.json"

Ubuntu:Pro:22.04:LTS / rclone

Package

Name
rclone
Purl
pkg:deb/ubuntu/rclone?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.53.3-1
1.53.3-2
1.53.3-4
1.53.3-4ubuntu1
1.53.3-4ubuntu1.22.04.1
1.53.3-4ubuntu1.22.04.2
1.53.3-4ubuntu1.22.04.3
1.53.3-4ubuntu1.22.04.3+esm1
1.53.3-4ubuntu1.22.04.4
1.53.3-4ubuntu1.22.04.4+esm1
1.53.3-4ubuntu1.22.04.5
1.53.3-4ubuntu1.22.04.5+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-rclone-rclone-dev",
            "binary_version": "1.53.3-4ubuntu1.22.04.5+esm1"
        },
        {
            "binary_name": "rclone",
            "binary_version": "1.53.3-4ubuntu1.22.04.5+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88018.json"

Ubuntu:Pro:24.04:LTS / rclone

Package

Name
rclone
Purl
pkg:deb/ubuntu/rclone?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.60.1+dfsg-2build1
1.60.1+dfsg-3
1.60.1+dfsg-3ubuntu0.24.04.1
1.60.1+dfsg-3ubuntu0.24.04.2
1.60.1+dfsg-3ubuntu0.24.04.3
1.60.1+dfsg-3ubuntu0.24.04.4
1.60.1+dfsg-3ubuntu0.24.04.4+esm1
1.60.1+dfsg-3ubuntu0.24.04.5
1.60.1+dfsg-3ubuntu0.24.04.5+esm1
1.60.1+dfsg-3ubuntu0.24.04.6
1.60.1+dfsg-3ubuntu0.24.04.6+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-rclone-rclone-dev",
            "binary_version": "1.60.1+dfsg-3ubuntu0.24.04.6+esm1"
        },
        {
            "binary_name": "rclone",
            "binary_version": "1.60.1+dfsg-3ubuntu0.24.04.6+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88018.json"

Ubuntu:Pro:26.04:LTS / rclone

Package

Name
rclone
Purl
pkg:deb/ubuntu/rclone?arch=source&distro=esm-apps%2Fresolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.60.1+dfsg-4ubuntu2
1.60.1+dfsg-4ubuntu3
1.60.1+dfsg-4ubuntu3.1
1.60.1+dfsg-4ubuntu3.1+esm1
1.60.1+dfsg-4ubuntu3.2
1.60.1+dfsg-4ubuntu3.2+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-rclone-rclone-dev",
            "binary_version": "1.60.1+dfsg-4ubuntu3.2+esm1"
        },
        {
            "binary_name": "rclone",
            "binary_version": "1.60.1+dfsg-4ubuntu3.2+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88018.json"