CVE-2026-9494

mediumpriority · track · 0EPSS 0.001 · 4 %ileDEEU

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.15% (4th) EPSS

CVSS 5.5 · medium

Is it mine?

16 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cert_bund

EPSS · scored 2026-10-27

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/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.

cvss

Technical severity, 0–10. One row per scoring source.

5.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nsecondary · security@ubuntu.comexploitability 1.8 · impact 3.6

v3.15.1mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-214US

affected products (16)

Products and version ranges known to be affected.

Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Ubuntu Linux≤ ubuntu-pro-client <19.7ubuntu0.1cert_bundDE
Ubuntu Linux≤ ubuntu-pro-client <37.1ubuntu0~16.04.1cert_bundDE
Ubuntu Linux≤ ubuntu-pro-client <37.1ubuntu0~18.04.1cert_bundDE
Ubuntu Linux≤ ubuntu-pro-client <37.2ubuntu0.1cert_bundDE
Ubuntu Linux≤ ubuntu-pro-client <37.2ubuntu~22.04.1cert_bundDE
Ubuntu Linux≤ ubuntu-pro-client <37.2ubuntu~24.04.1cert_bundDE
Ubuntu Linux≤ ubuntu-pro-client <37.1ubuntu0~20.04.1cert_bundDE
Canonical Ubuntu 14.04 LTS< 19.7ubuntu0.1enisa_euvdEU
Canonical Ubuntu 16.04 LTS< 37.1ubuntu0~16.04.1enisa_euvdEU
Canonical Ubuntu 18.04 LTS< 37.1ubuntu0~18.04.1enisa_euvdEU
Canonical Ubuntu 20.04 LTS< 37.1ubuntu0~20.04.1enisa_euvdEU
Canonical Ubuntu 22.04 LTS< 37.2ubuntu~22.04.1enisa_euvdEU
Canonical Ubuntu 24.04 LTS< 37.2ubuntu~24.04.1enisa_euvdEU
Canonical Ubuntu 26.04 LTS< 37.2ubuntu0.1enisa_euvdEU
Canonical ubuntu-pro-client (ubuntu-advantage-tools)0 → 37.3enisa_euvdEU

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2393Ubuntu Linux (ubuntu-pro-client): Mehrere SchwachstellenDeutsch2026-07-16csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen im ubuntu-pro-client von Ubuntu Linux ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen und vertrauliche Informationen offenzulegen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund NVD CVE.org MITRE

published 2026-07-16modified 2026-07-16

references (3)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan