UBUNTU-CVE-2026-34839

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Source
https://ubuntu.com/security/CVE-2026-34839
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34839.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-34839
Upstream
  • CVE-2026-34839
Published
2026-04-21T00:16:00Z
Modified
2026-05-20T16:25:34.758822210Z
Severity
  • 7.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P CVSS Calculator
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.4, the Glances web server exposes a REST API (/api/4/*) that is accessible without authentication and allows cross-origin requests from any origin due to a permissive CORS policy (Access-Control-Allow-Origin: *). This allows a malicious website to read sensitive system information from a running Glances instance in the victim’s browser, leading to cross-origin data exfiltration. While a previous advisory exists for XML-RPC CORS issues, this report demonstrates that the REST API (/api/4/*) is also affected and exposes significantly more sensitive data. Version 4.5.4 patches the issue.

References

Affected packages

Ubuntu:22.04:LTS
glances

Package

Name
glances
Purl
pkg:deb/ubuntu/glances?arch=source&distro=jammy

Affected ranges

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

Affected versions

3.*
3.1.5-1
3.2.3.1+dfsg-1
3.2.4.2+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.2.4.2+dfsg-1",
            "binary_name": "glances"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34839.json"
Ubuntu:24.04:LTS
glances

Package

Name
glances
Purl
pkg:deb/ubuntu/glances?arch=source&distro=noble

Affected ranges

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

Affected versions

3.*
3.4.0.3+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.4.0.3+dfsg-1",
            "binary_name": "glances"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34839.json"
Ubuntu:25.10
glances

Package

Name
glances
Purl
pkg:deb/ubuntu/glances?arch=source&distro=questing

Affected ranges

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

Affected versions

4.*
4.3.0.8+dfsg-1
4.3.1+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.3.1+dfsg-1",
            "binary_name": "glances"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34839.json"
Ubuntu:26.04:LTS
glances

Package

Name
glances
Purl
pkg:deb/ubuntu/glances?arch=source&distro=resolute

Affected ranges

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

Affected versions

4.*
4.3.1+dfsg-1
4.3.3+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.3.3+dfsg-1",
            "binary_name": "glances"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34839.json"
Ubuntu:Pro:16.04:LTS
glances

Package

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

Affected ranges

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

Affected versions

2.*
2.3-1build1
2.3-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.3-1ubuntu0.1~esm1",
            "binary_name": "glances"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34839.json"
Ubuntu:Pro:18.04:LTS
glances

Package

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

Affected ranges

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

Affected versions

2.*
2.10-2
2.11.1-1
2.11.1-2
2.11.1-3
2.11.1-3ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.11.1-3ubuntu0.1~esm1",
            "binary_name": "glances"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34839.json"
Ubuntu:Pro:20.04:LTS
glances

Package

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

Affected ranges

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

Affected versions

3.*
3.1.0-1
3.1.1-1
3.1.3-1
3.1.3-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.1.3-1ubuntu0.1~esm1",
            "binary_name": "glances"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34839.json"