UBUNTU-CVE-2026-55584

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Source
https://ubuntu.com/security/CVE-2026-55584
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55584.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-55584
Upstream
Published
2026-08-28T20:18:00Z
Modified
2026-09-02T16:20:01Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

phpSysInfo is a customizable PHP script that displays system information. Prior to 3.4.6, the PSIALLOWED access-control check in readconfig.php trusts attacker-controlled X-Forwarded-For and Client-IP HTTP headers before REMOTE_ADDR. A remote unauthenticated attacker can supply an allowed address in one of these headers to impersonate a trusted client and access exposed hostname, kernel, CPU, memory, filesystem, and network-interface information. This issue is fixed in version 3.4.6.

References

Affected packages

Ubuntu:16.04:LTS
phpsysinfo

Package

Name
phpsysinfo
Purl
pkg:deb/ubuntu/phpsysinfo?arch=source&distro=xenial

Affected ranges

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

Affected versions

3.*
3.0.17-1ubuntu1
3.2.1-1ubuntu1
3.2.1-1ubuntu2
3.2.1-1ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "phpsysinfo",
            "binary_version": "3.2.1-1ubuntu3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55584.json"
Ubuntu:18.04:LTS
phpsysinfo

Package

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

Affected ranges

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

Affected versions

3.*
3.2.5-3ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "phpsysinfo",
            "binary_version": "3.2.5-3ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55584.json"
Ubuntu:20.04:LTS
phpsysinfo

Package

Name
phpsysinfo
Purl
pkg:deb/ubuntu/phpsysinfo?arch=source&distro=focal

Affected ranges

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

Affected versions

3.*
3.2.5-3ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "phpsysinfo",
            "binary_version": "3.2.5-3ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55584.json"
Ubuntu:22.04:LTS
phpsysinfo

Package

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

Affected ranges

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

Affected versions

3.*
3.2.5-3ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "phpsysinfo",
            "binary_version": "3.2.5-3ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55584.json"
Ubuntu:24.04:LTS
phpsysinfo

Package

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

Affected ranges

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

Affected versions

3.*
3.4.3-1
3.4.3-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "phpsysinfo",
            "binary_version": "3.4.3-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55584.json"
Ubuntu:26.04:LTS
phpsysinfo

Package

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

Affected ranges

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

Affected versions

3.*
3.4.4-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "phpsysinfo",
            "binary_version": "3.4.4-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55584.json"