CVE-2026-9494 (GCVE-0-2026-9494)
Vulnerability from cvelistv5
Published
2026-07-16 12:12
Modified
2026-07-16 15:11
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-214 - Invocation of process using visible sensitive information
Summary
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.
References
| URL | Tags | |
|---|---|---|
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-9494",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-16T13:36:06.361605Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T15:11:07.229Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://github.com/canonical/",
"defaultStatus": "unaffected",
"packageName": "ubuntu-pro-client",
"platforms": [
"Linux"
],
"product": "ubuntu-pro-client (ubuntu-advantage-tools)",
"repo": "https://github.com/canonical/ubuntu-pro-client",
"vendor": "Canonical",
"versions": [
{
"lessThan": "37.3",
"status": "affected",
"version": "0",
"versionType": "python"
}
]
},
{
"collectionURL": "https://launchpad.net/ubuntu/resolute",
"defaultStatus": "affected",
"packageName": "ubuntu-advantage-tools",
"platforms": [
"Linux"
],
"product": "Ubuntu 26.04 LTS",
"repo": "https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools",
"vendor": "Canonical",
"versions": [
{
"status": "unaffected",
"version": "37.2ubuntu0.1",
"versionType": "dpkg"
}
]
},
{
"collectionURL": "https://launchpad.net/ubuntu/noble",
"defaultStatus": "affected",
"packageName": "ubuntu-advantage-tools",
"platforms": [
"Linux"
],
"product": "Ubuntu 24.04 LTS",
"repo": "https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools",
"vendor": "Canonical",
"versions": [
{
"status": "unaffected",
"version": "37.2ubuntu~24.04.1",
"versionType": "dpkg"
}
]
},
{
"collectionURL": "https://launchpad.net/ubuntu/jammy",
"defaultStatus": "affected",
"packageName": "ubuntu-advantage-tools",
"platforms": [
"Linux"
],
"product": "Ubuntu 22.04 LTS",
"repo": "https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools",
"vendor": "Canonical",
"versions": [
{
"status": "unaffected",
"version": "37.2ubuntu~22.04.1",
"versionType": "dpkg"
}
]
},
{
"collectionURL": "https://launchpad.net/ubuntu/focal",
"defaultStatus": "affected",
"packageName": "ubuntu-advantage-tools",
"platforms": [
"Linux"
],
"product": "Ubuntu 20.04 LTS",
"repo": "https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools",
"vendor": "Canonical",
"versions": [
{
"status": "unaffected",
"version": "37.1ubuntu0~20.04.1",
"versionType": "dpkg"
}
]
},
{
"collectionURL": "https://launchpad.net/ubuntu/bionic",
"defaultStatus": "affected",
"packageName": "ubuntu-advantage-tools",
"platforms": [
"Linux"
],
"product": "Ubuntu 18.04 LTS",
"repo": "https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools",
"vendor": "Canonical",
"versions": [
{
"status": "unaffected",
"version": "37.1ubuntu0~18.04.1",
"versionType": "dpkg"
}
]
},
{
"collectionURL": "https://launchpad.net/ubuntu/xenial",
"defaultStatus": "affected",
"packageName": "ubuntu-advantage-tools",
"platforms": [
"Linux"
],
"product": "Ubuntu 16.04 LTS",
"repo": "https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools",
"vendor": "Canonical",
"versions": [
{
"status": "unaffected",
"version": "37.1ubuntu0~16.04.1",
"versionType": "dpkg"
}
]
},
{
"collectionURL": "https://launchpad.net/ubuntu/trusty",
"defaultStatus": "affected",
"packageName": "ubuntu-advantage-tools",
"platforms": [
"Linux"
],
"product": "Ubuntu 14.04 LTS",
"repo": "https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools",
"vendor": "Canonical",
"versions": [
{
"status": "unaffected",
"version": "19.7ubuntu0.1",
"versionType": "dpkg"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Bilal Teke"
}
],
"datePublic": "2026-07-16T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "An information disclosure vulnerability exists in Canonical ubuntu-pro-client\u003cbr\u003e(formerly ubuntu-advantage-tools). The client validates Ubuntu Pro APT\u003cbr\u003ecredentials by executing /usr/lib/apt/apt-helper using the download-file\u003cbr\u003ecommand. During this process, the secret bearer token is embedded directly in\u003cbr\u003ethe cleartext URL component passed via the command-line arguments (argv),\u003cbr\u003eresulting in a URL format such as https://bearer:\u003ctoken\u003e@esm.ubuntu.com/.../.\u003cbr\u003eOn systems utilizing a default-mounted /proc file system where process-hiding\u003cbr\u003emitigations (such as hidepid) are disabled, an unprivileged local attacker can\u003cbr\u003emonitor system processes and read the sensitive bearer token directly from\u003cbr\u003e/proc/cmdline while the helper process is actively running. This leaked\u003cbr\u003etoken can subsequently be used to gain unauthorized access to the victim\u0027s\u003cbr\u003eUbuntu Pro or Expanded Security Maintenance (ESM) repositories.\u003cbr\u003e"
}
],
"value": "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\nthe cleartext URL component passed via the command-line arguments (argv), resulting in a URL format such as https://bearer:\u003ctoken\u003e@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\nmonitor 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\u0027s Ubuntu Pro or Expanded Security Maintenance (ESM) repositories."
}
],
"impacts": [
{
"capecId": "CAPEC-13",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-13 Subverting Environment Variable Values"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-214",
"description": "CWE-214 Invocation of process using visible sensitive information",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T12:12:27.447Z",
"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"shortName": "canonical"
},
"references": [
{
"tags": [
"vdb-entry"
],
"url": "https://ubuntu.com/security/CVE-2026-9494"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "ubuntu-pro-client Information Disclosure via Cleartext Bearer Token Exposure in Process Command Line"
}
},
"cveMetadata": {
"assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"assignerShortName": "canonical",
"cveId": "CVE-2026-9494",
"datePublished": "2026-07-16T12:12:27.447Z",
"dateReserved": "2026-05-25T08:23:24.573Z",
"dateUpdated": "2026-07-16T15:11:07.229Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-9494\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-16T13:36:06.361605Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-16T13:36:11.538Z\"}}], \"cna\": {\"title\": \"ubuntu-pro-client Information Disclosure via Cleartext Bearer Token Exposure in Process Command Line\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Bilal Teke\"}], \"impacts\": [{\"capecId\": \"CAPEC-13\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-13 Subverting Environment Variable Values\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://github.com/canonical/ubuntu-pro-client\", \"vendor\": \"Canonical\", \"product\": \"ubuntu-pro-client (ubuntu-advantage-tools)\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"37.3\", \"versionType\": \"python\"}], \"platforms\": [\"Linux\"], \"packageName\": \"ubuntu-pro-client\", \"collectionURL\": \"https://github.com/canonical/\", \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools\", \"vendor\": \"Canonical\", \"product\": \"Ubuntu 26.04 LTS\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"37.2ubuntu0.1\", \"versionType\": \"dpkg\"}], \"platforms\": [\"Linux\"], \"packageName\": \"ubuntu-advantage-tools\", \"collectionURL\": \"https://launchpad.net/ubuntu/resolute\", \"defaultStatus\": \"affected\"}, {\"repo\": \"https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools\", \"vendor\": \"Canonical\", \"product\": \"Ubuntu 24.04 LTS\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"37.2ubuntu~24.04.1\", \"versionType\": \"dpkg\"}], \"platforms\": [\"Linux\"], \"packageName\": \"ubuntu-advantage-tools\", \"collectionURL\": \"https://launchpad.net/ubuntu/noble\", \"defaultStatus\": \"affected\"}, {\"repo\": \"https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools\", \"vendor\": \"Canonical\", \"product\": \"Ubuntu 22.04 LTS\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"37.2ubuntu~22.04.1\", \"versionType\": \"dpkg\"}], \"platforms\": [\"Linux\"], \"packageName\": \"ubuntu-advantage-tools\", \"collectionURL\": \"https://launchpad.net/ubuntu/jammy\", \"defaultStatus\": \"affected\"}, {\"repo\": \"https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools\", \"vendor\": \"Canonical\", \"product\": \"Ubuntu 20.04 LTS\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"37.1ubuntu0~20.04.1\", \"versionType\": \"dpkg\"}], \"platforms\": [\"Linux\"], \"packageName\": \"ubuntu-advantage-tools\", \"collectionURL\": \"https://launchpad.net/ubuntu/focal\", \"defaultStatus\": \"affected\"}, {\"repo\": \"https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools\", \"vendor\": \"Canonical\", \"product\": \"Ubuntu 18.04 LTS\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"37.1ubuntu0~18.04.1\", \"versionType\": \"dpkg\"}], \"platforms\": [\"Linux\"], \"packageName\": \"ubuntu-advantage-tools\", \"collectionURL\": \"https://launchpad.net/ubuntu/bionic\", \"defaultStatus\": \"affected\"}, {\"repo\": \"https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools\", \"vendor\": \"Canonical\", \"product\": \"Ubuntu 16.04 LTS\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"37.1ubuntu0~16.04.1\", \"versionType\": \"dpkg\"}], \"platforms\": [\"Linux\"], \"packageName\": \"ubuntu-advantage-tools\", \"collectionURL\": \"https://launchpad.net/ubuntu/xenial\", \"defaultStatus\": \"affected\"}, {\"repo\": \"https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools\", \"vendor\": \"Canonical\", \"product\": \"Ubuntu 14.04 LTS\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"19.7ubuntu0.1\", \"versionType\": \"dpkg\"}], \"platforms\": [\"Linux\"], \"packageName\": \"ubuntu-advantage-tools\", \"collectionURL\": \"https://launchpad.net/ubuntu/trusty\", \"defaultStatus\": \"affected\"}], \"datePublic\": \"2026-07-16T12:00:00.000Z\", \"references\": [{\"url\": \"https://ubuntu.com/security/CVE-2026-9494\", \"tags\": [\"vdb-entry\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"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\\nthe cleartext URL component passed via the command-line arguments (argv), resulting in a URL format such as https://bearer:\u003ctoken\u003e@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\\nmonitor 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\u0027s Ubuntu Pro or Expanded Security Maintenance (ESM) repositories.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"An information disclosure vulnerability exists in Canonical ubuntu-pro-client\u003cbr\u003e(formerly ubuntu-advantage-tools). The client validates Ubuntu Pro APT\u003cbr\u003ecredentials by executing /usr/lib/apt/apt-helper using the download-file\u003cbr\u003ecommand. During this process, the secret bearer token is embedded directly in\u003cbr\u003ethe cleartext URL component passed via the command-line arguments (argv),\u003cbr\u003eresulting in a URL format such as https://bearer:\u003ctoken\u003e@esm.ubuntu.com/.../.\u003cbr\u003eOn systems utilizing a default-mounted /proc file system where process-hiding\u003cbr\u003emitigations (such as hidepid) are disabled, an unprivileged local attacker can\u003cbr\u003emonitor system processes and read the sensitive bearer token directly from\u003cbr\u003e/proc/cmdline while the helper process is actively running. This leaked\u003cbr\u003etoken can subsequently be used to gain unauthorized access to the victim\u0027s\u003cbr\u003eUbuntu Pro or Expanded Security Maintenance (ESM) repositories.\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-214\", \"description\": \"CWE-214 Invocation of process using visible sensitive information\"}]}], \"providerMetadata\": {\"orgId\": \"cc1ad9ee-3454-478d-9317-d3e869d708bc\", \"shortName\": \"canonical\", \"dateUpdated\": \"2026-07-16T12:12:27.447Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-9494\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-16T15:11:07.229Z\", \"dateReserved\": \"2026-05-25T08:23:24.573Z\", \"assignerOrgId\": \"cc1ad9ee-3454-478d-9317-d3e869d708bc\", \"datePublished\": \"2026-07-16T12:12:27.447Z\", \"assignerShortName\": \"canonical\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…