UBUNTU-CVE-2026-125108

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Source
https://ubuntu.com/security/CVE-2026-125108
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-125108.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-125108
Upstream
Published
2026-11-12T00:00:00Z
Modified
2026-11-12T23:46:34Z
Severity
  • Ubuntu - medium
Summary
[none]
Details

Rack is a modular Ruby web server interface. Prior to 2.2.25, 3.1.23, and 3.2.8, Rack::Multipart::Parser.parse_boundary can skip a leading empty or quoted boundary parameter in a multipart Content-Type header and accept a later parameter. Rack can therefore parse a request body with a boundary that a conforming intermediary would not derive, allowing form fields or file uploads to reach an application without the intended proxy or web application firewall inspection. This issue is fixed in versions 2.2.25, 3.1.23, and 3.2.8.

References

Affected packages

Ubuntu:24.04:LTS
ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/ubuntu/ruby-rack?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.2.4-3
2.2.7-1
2.2.7-1ubuntu0.1
2.2.7-1ubuntu0.2
2.2.7-1ubuntu0.3
2.2.7-1ubuntu0.4
2.2.7-1ubuntu0.5
2.2.7-1ubuntu0.6
2.2.7-1ubuntu0.7

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-rack",
            "binary_version": "2.2.7-1ubuntu0.7"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-125108.json"
Ubuntu:26.04:LTS
ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/ubuntu/ruby-rack?arch=source&distro=resolute

Affected ranges

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

Affected versions

3.*
3.1.16-0.1
3.1.18-1
3.1.18-1build1
3.2.4-1ubuntu1
3.2.4-1ubuntu1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-rack",
            "binary_version": "3.2.4-1ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-125108.json"
Ubuntu:26.10
ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/ubuntu/ruby-rack?arch=source&distro=stonking

Affected ranges

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

Affected versions

3.*
3.2.4-1ubuntu1
3.2.6-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-rack",
            "binary_version": "3.2.6-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-125108.json"
Ubuntu:Pro:14.04:LTS
ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/ubuntu/ruby-rack?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.*
1.5.2-1
1.5.2-1ubuntu0.1~esm1
1.5.2-3+deb8u3ubuntu1~esm2
1.5.2-3+deb8u3ubuntu1~esm3
1.5.2-3+deb8u3ubuntu1~esm4
1.5.2-3+deb8u3ubuntu1~esm6
1.5.2-3+deb8u3ubuntu1~esm7
1.5.2-3+deb8u3ubuntu1~esm8
1.5.2-3+deb8u3ubuntu1~esm9
1.5.2-3+deb8u3ubuntu1~esm10
1.5.2-3+deb8u3ubuntu1~esm11

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librack-ruby",
            "binary_version": "1.5.2-3+deb8u3ubuntu1~esm11"
        },
        {
            "binary_name": "librack-ruby1.8",
            "binary_version": "1.5.2-3+deb8u3ubuntu1~esm11"
        },
        {
            "binary_name": "librack-ruby1.9.1",
            "binary_version": "1.5.2-3+deb8u3ubuntu1~esm11"
        },
        {
            "binary_name": "ruby-rack",
            "binary_version": "1.5.2-3+deb8u3ubuntu1~esm11"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-125108.json"
Ubuntu:Pro:16.04:LTS
ruby-rack

Package

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

Affected ranges

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

Affected versions

1.*
1.5.2-4
1.6.4-2
1.6.4-3
1.6.4-3ubuntu0.1
1.6.4-3ubuntu0.2
1.6.4-3ubuntu0.2+esm1
1.6.4-3ubuntu0.2+esm2
1.6.4-3ubuntu0.2+esm4
1.6.4-3ubuntu0.2+esm5
1.6.4-3ubuntu0.2+esm6
1.6.4-3ubuntu0.2+esm7
1.6.4-3ubuntu0.2+esm8
1.6.4-3ubuntu0.2+esm9
1.6.4-3ubuntu0.2+esm10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-rack",
            "binary_version": "1.6.4-3ubuntu0.2+esm10"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-125108.json"
Ubuntu:Pro:18.04:LTS
ruby-rack

Package

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

Affected ranges

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

Affected versions

1.*
1.6.4-4
1.6.4-4ubuntu0.1
1.6.4-4ubuntu0.2
1.6.4-4ubuntu0.2+esm1
1.6.4-4ubuntu0.2+esm2
1.6.4-4ubuntu0.2+esm4
1.6.4-4ubuntu0.2+esm5
1.6.4-4ubuntu0.2+esm6
1.6.4-4ubuntu0.2+esm7
1.6.4-4ubuntu0.2+esm8
1.6.4-4ubuntu0.2+esm9
1.6.4-4ubuntu0.2+esm10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-rack",
            "binary_version": "1.6.4-4ubuntu0.2+esm10"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-125108.json"
Ubuntu:Pro:20.04:LTS
ruby-rack

Package

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

Affected ranges

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

Affected versions

2.*
2.0.6-3
2.0.7-2
2.0.7-2ubuntu0.1
2.0.7-2ubuntu0.1+esm1
2.0.7-2ubuntu0.1+esm2
2.0.7-2ubuntu0.1+esm3
2.0.7-2ubuntu0.1+esm4
2.0.7-2ubuntu0.1+esm5
2.0.7-2ubuntu0.1+esm6
2.0.7-2ubuntu0.1+esm7
2.0.7-2ubuntu0.1+esm8
2.0.7-2ubuntu0.1+esm9
2.0.7-2ubuntu0.1+esm10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-rack",
            "binary_version": "2.0.7-2ubuntu0.1+esm10"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-125108.json"
Ubuntu:Pro:22.04:LTS
ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/ubuntu/ruby-rack?arch=source&distro=esm-apps%2Fjammy

Affected ranges

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

Affected versions

2.*
2.1.4-3
2.1.4-4
2.1.4-5
2.1.4-5ubuntu1
2.1.4-5ubuntu1+esm2
2.1.4-5ubuntu1+esm3
2.1.4-5ubuntu1+esm4
2.1.4-5ubuntu1+esm5
2.1.4-5ubuntu1.1
2.1.4-5ubuntu1.1+esm1
2.1.4-5ubuntu1.1+esm2
2.1.4-5ubuntu1.2
2.1.4-5ubuntu1.2+esm1
2.1.4-5ubuntu1.2+esm2
2.1.4-5ubuntu1.2+esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-rack",
            "binary_version": "2.1.4-5ubuntu1.2+esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-125108.json"