UBUNTU-CVE-2026-124738

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Source
https://ubuntu.com/security/CVE-2026-124738
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-124738.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-124738
Upstream
  • CVE-2026-124738
Published
2026-11-12T00:00:00Z
Modified
2026-11-12T23:46:17Z
Severity
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in BusyBox. When the HTTP daemon (httpd) has pre-compressed file support enabled, authentication checks are evaluated only against the requested URL path rather than the pre-compressed file being served. A remote attacker can exploit this flaw by requesting an uncompressed file path while specifying gzip encoding, bypassing password rules configured specifically for the compressed file. This vulnerability can lead to unauthorized information disclosure of sensitive files.

References

Affected packages

Ubuntu:20.04:LTS
busybox

Package

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

Affected ranges

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

Affected versions

1:1.*
1:1.30.1-4ubuntu4
1:1.30.1-4ubuntu5
1:1.30.1-4ubuntu6
1:1.30.1-4ubuntu6.1
1:1.30.1-4ubuntu6.2
1:1.30.1-4ubuntu6.3
1:1.30.1-4ubuntu6.4
1:1.30.1-4ubuntu6.5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.30.1-4ubuntu6.5"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.30.1-4ubuntu6.5"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.30.1-4ubuntu6.5"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.30.1-4ubuntu6.5"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.30.1-4ubuntu6.5"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.30.1-4ubuntu6.5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-124738.json"
Ubuntu:22.04:LTS
busybox

Package

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

Affected ranges

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

Affected versions

1:1.*
1:1.30.1-6ubuntu3
1:1.30.1-7ubuntu1
1:1.30.1-7ubuntu2
1:1.30.1-7ubuntu3
1:1.30.1-7ubuntu3.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.30.1-7ubuntu3.1"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.30.1-7ubuntu3.1"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.30.1-7ubuntu3.1"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.30.1-7ubuntu3.1"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.30.1-7ubuntu3.1"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.30.1-7ubuntu3.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-124738.json"
Ubuntu:24.04:LTS
busybox

Package

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

Affected ranges

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

Affected versions

1:1.*
1:1.36.1-3ubuntu1
1:1.36.1-6ubuntu1
1:1.36.1-6ubuntu3
1:1.36.1-6ubuntu3.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.36.1-6ubuntu3.1"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.36.1-6ubuntu3.1"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.36.1-6ubuntu3.1"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.36.1-6ubuntu3.1"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.36.1-6ubuntu3.1"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.36.1-6ubuntu3.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-124738.json"
Ubuntu:26.04:LTS
busybox

Package

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

Affected ranges

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

Affected versions

1:1.*
1:1.37.0-4ubuntu1
1:1.37.0-7ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.37.0-7ubuntu1"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.37.0-7ubuntu1"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.37.0-7ubuntu1"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.37.0-7ubuntu1"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.37.0-7ubuntu1"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.37.0-7ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-124738.json"
Ubuntu:26.10
busybox

Package

Name
busybox
Purl
pkg:deb/ubuntu/busybox?arch=source&distro=stonking

Affected ranges

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

Affected versions

1:1.*
1:1.37.0-7ubuntu1
1:1.37.0-10.1ubuntu2
1:1.37.0-10.1ubuntu3
1:1.38.0-3ubuntu1
1:1.38.0-3ubuntu3
1:1.38.0-3ubuntu4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.38.0-3ubuntu4"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.38.0-3ubuntu4"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.38.0-3ubuntu4"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.38.0-3ubuntu4"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.38.0-3ubuntu4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-124738.json"
Ubuntu:Pro:14.04:LTS
busybox

Package

Name
busybox
Purl
pkg:deb/ubuntu/busybox?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

1:1.*
1:1.20.0-8.1ubuntu1
1:1.20.0-9ubuntu1
1:1.20.0-9ubuntu2
1:1.21.0-1ubuntu1
1:1.21.0-1ubuntu1.4
1:1.21.0-1ubuntu1.4+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-124738.json"
Ubuntu:Pro:16.04:LTS
busybox

Package

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

Affected ranges

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

Affected versions

1:1.*
1:1.22.0-15ubuntu1
1:1.22.0-15ubuntu1.4
1:1.22.0-15ubuntu1.4+esm1
1:1.22.0-15ubuntu1.4+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-124738.json"
Ubuntu:Pro:18.04:LTS
busybox

Package

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

Affected ranges

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

Affected versions

1:1.*
1:1.22.0-19ubuntu2
1:1.27.2-1ubuntu3
1:1.27.2-1ubuntu4
1:1.27.2-2ubuntu2
1:1.27.2-2ubuntu3
1:1.27.2-2ubuntu3.1
1:1.27.2-2ubuntu3.2
1:1.27.2-2ubuntu3.3
1:1.27.2-2ubuntu3.4
1:1.27.2-2ubuntu3.4+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-124738.json"