UBUNTU-CVE-2026-88829

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Source
https://ubuntu.com/security/CVE-2026-88829
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88829.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-88829
Upstream
  • CVE-2026-88829
Published
2026-10-15T00:00:00Z
Modified
2026-10-17T13:01:16Z
Severity
  • 7.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in BusyBox httpd's reverse proxy feature. When the proxy is configured to forward requests matching a URL prefix to a backend server, only the first HTTP request on a TCP connection has its path rewritten. An attacker can send a pipelined second request that is relayed verbatim to the backend, bypassing the configured path restrictions. This allows accessing arbitrary paths on the backend server that were not intended to be exposed through the proxy.

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-2026-88829.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-2026-88829.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-2026-88829.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-2026-88829.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-2026-88829.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-2026-88829.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-2026-88829.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-2026-88829.json"