UBUNTU-CVE-2026-9494

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-9494
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9494.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-9494
Upstream
  • CVE-2026-9494
Downstream
Related
Published
2026-07-17T14:00:00Z
Modified
2026-07-16T16:00:16.356434756Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An information disclosure vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-advantage-tools). The client validates Ubuntu Pro APT credentials by executing /usr/lib/apt/apt-helper using the download-file command. During this process, the secret bearer token is embedded directly in the cleartext URL component passed via the command-line arguments (argv), resulting in a URL format such as https://bearer:<token>@esm.ubuntu.com/.../. On systems utilizing a default-mounted /proc file system where process-hiding mitigations (such as hidepid) are disabled, an unprivileged local attacker can monitor system processes and read the sensitive bearer token directly from /proc/<pid>/cmdline while the helper process is actively running. This leaked token can subsequently be used to gain unauthorized access to the victim's Ubuntu Pro or Expanded Security Maintenance (ESM) repositories.

References

Affected packages

Ubuntu:22.04:LTS / ubuntu-advantage-tools

Package

Name
ubuntu-advantage-tools
Purl
pkg:deb/ubuntu/ubuntu-advantage-tools?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
37.2ubuntu~22.04.1

Affected versions

27.*
27.2.2~21.10.1
27.3~21.10.1
27.4~22.04.1
27.4.1~22.04.1
27.4.2~22.04.1
27.5~22.04.1
27.6~22.04.1
27.7~22.04.1
27.8~22.04.1
27.9~22.04.1
27.10.1~22.04.1
27.11.2~22.04.1
27.11.3~22.04.1
27.12~22.04.1
27.13.1~22.04.1
27.13.2~22.04.1
27.13.3~22.04.1
27.13.5~22.04.1
27.13.6~22.04.1
27.14.4~22.04
28.*
28.1~22.04
29.*
29.4~22.04
30~22.*
30~22.04
31.*
31.2~22.04
31.2.2~22.04
31.2.3~22.04
32.*
32.3~22.04
32.3.1~22.04
33.*
33.2~22.04
34~22.*
34~22.04
35.*
35.1ubuntu0~22.04
36ubuntu0~22.*
36ubuntu0~22.04
37.*
37.1ubuntu0~22.04
37.2ubuntu~22.04

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "37.2ubuntu~22.04.1",
            "binary_name": "ubuntu-advantage-pro"
        },
        {
            "binary_version": "37.2ubuntu~22.04.1",
            "binary_name": "ubuntu-advantage-tools"
        },
        {
            "binary_version": "37.2ubuntu~22.04.1",
            "binary_name": "ubuntu-pro-auto-attach"
        },
        {
            "binary_version": "37.2ubuntu~22.04.1",
            "binary_name": "ubuntu-pro-client"
        },
        {
            "binary_version": "37.2ubuntu~22.04.1",
            "binary_name": "ubuntu-pro-client-l10n"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9494.json"

Ubuntu:24.04:LTS / ubuntu-advantage-tools

Package

Name
ubuntu-advantage-tools
Purl
pkg:deb/ubuntu/ubuntu-advantage-tools?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
37.2ubuntu~24.04.1

Affected versions

29.*
29.4
Other
30
30.*
30.1
31.*
31.1
31.2.2
31.2.2build1
31.2.3
32.*
32.3~24.04
32.3.1~24.04
33.*
33.2~24.04.1
34~24.*
34~24.04
35.*
35.1ubuntu0~24.04
36ubuntu0~24.*
36ubuntu0~24.04
37.*
37.1ubuntu0~24.04
37.2ubuntu~24.04

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "37.2ubuntu~24.04.1",
            "binary_name": "ubuntu-advantage-pro"
        },
        {
            "binary_version": "37.2ubuntu~24.04.1",
            "binary_name": "ubuntu-advantage-tools"
        },
        {
            "binary_version": "37.2ubuntu~24.04.1",
            "binary_name": "ubuntu-pro-auto-attach"
        },
        {
            "binary_version": "37.2ubuntu~24.04.1",
            "binary_name": "ubuntu-pro-client"
        },
        {
            "binary_version": "37.2ubuntu~24.04.1",
            "binary_name": "ubuntu-pro-client-l10n"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9494.json"

Ubuntu:25.10 / ubuntu-advantage-tools

Package

Name
ubuntu-advantage-tools
Purl
pkg:deb/ubuntu/ubuntu-advantage-tools?arch=source&distro=questing

Affected ranges

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

Affected versions

Other
35
36ubuntu0
37ubuntu0
35.*
35.1ubuntu0
37.*
37.1ubuntu0~25.10
37.2ubuntu~25.10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "37.2ubuntu~25.10",
            "binary_name": "ubuntu-advantage-pro"
        },
        {
            "binary_version": "37.2ubuntu~25.10",
            "binary_name": "ubuntu-advantage-tools"
        },
        {
            "binary_version": "37.2ubuntu~25.10",
            "binary_name": "ubuntu-pro-auto-attach"
        },
        {
            "binary_version": "37.2ubuntu~25.10",
            "binary_name": "ubuntu-pro-client"
        },
        {
            "binary_version": "37.2ubuntu~25.10",
            "binary_name": "ubuntu-pro-client-l10n"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9494.json"

Ubuntu:26.04:LTS / ubuntu-advantage-tools

Package

Name
ubuntu-advantage-tools
Purl
pkg:deb/ubuntu/ubuntu-advantage-tools?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
37.2ubuntu0.1

Affected versions

Other
37ubuntu0
37.*
37.1ubuntu0
37.2ubuntu

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "37.2ubuntu0.1",
            "binary_name": "ubuntu-advantage-pro"
        },
        {
            "binary_version": "37.2ubuntu0.1",
            "binary_name": "ubuntu-advantage-tools"
        },
        {
            "binary_version": "37.2ubuntu0.1",
            "binary_name": "ubuntu-pro-auto-attach"
        },
        {
            "binary_version": "37.2ubuntu0.1",
            "binary_name": "ubuntu-pro-client"
        },
        {
            "binary_version": "37.2ubuntu0.1",
            "binary_name": "ubuntu-pro-client-l10n"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9494.json"