UBUNTU-CVE-2026-126071

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Source
https://ubuntu.com/security/CVE-2026-126071
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126071.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-126071
Upstream
Published
2026-11-12T00:00:00Z
Modified
2026-11-12T23:46:37Z
Severity
  • Ubuntu - medium
Summary
[none]
Details

Active Storage makes it simple to upload and reference files in cloud services and attach those files to Active Record objects. From 8.0 until 8.0.5.2 and 8.1.4.1, when Active Storage serves a file through its proxy controllers, ActiveStorage::Streaming#send_blob_stream handles an error from the storage service by calling head to send a 404 or 500 response. If the error occurs after the first chunk has been written, the response is already committed, and head replaces the response body while the server is still reading the original ActionController::Live buffer. That buffer is never closed, so the server thread handling the request blocks until the process restarts. Repeated failed downloads could exhaust the server's threads, possibly resulting in a DoS vulnerability. Applications are affected when they store files on a service that streams a download in several requests, such as Amazon S3, an S3-compatible service or Google Cloud Storage, and draw Active Storage's default routes. The proxy routes are drawn whether or not proxy mode is the default for the application. A file deleted while it is being served, or any other storage error partway through a download, triggers the condition. This issue is fixed in versions 8.1.4.1 and 8.0.5.2.

References

Affected packages

Ubuntu:24.04:LTS
rails

Package

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

Affected ranges

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

Affected versions

2:6.*
2:6.1.7.3+dfsg-2build1
2:6.1.7.3+dfsg-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rails",
            "binary_version": "2:6.1.7.3+dfsg-3"
        },
        {
            "binary_name": "ruby-actioncable",
            "binary_version": "2:6.1.7.3+dfsg-3"
        },
        {
            "binary_name": "ruby-actionmailbox",
            "binary_version": "2:6.1.7.3+dfsg-3"
        },
        {
            "binary_name": "ruby-actionmailer",
            "binary_version": "2:6.1.7.3+dfsg-3"
        },
        {
            "binary_name": "ruby-actionpack",
            "binary_version": "2:6.1.7.3+dfsg-3"
        },
        {
            "binary_name": "ruby-actiontext",
            "binary_version": "2:6.1.7.3+dfsg-3"
        },
        {
            "binary_name": "ruby-actionview",
            "binary_version": "2:6.1.7.3+dfsg-3"
        },
        {
            "binary_name": "ruby-activejob",
            "binary_version": "2:6.1.7.3+dfsg-3"
        },
        {
            "binary_name": "ruby-activemodel",
            "binary_version": "2:6.1.7.3+dfsg-3"
        },
        {
            "binary_name": "ruby-activerecord",
            "binary_version": "2:6.1.7.3+dfsg-3"
        },
        {
            "binary_name": "ruby-activestorage",
            "binary_version": "2:6.1.7.3+dfsg-3"
        },
        {
            "binary_name": "ruby-activesupport",
            "binary_version": "2:6.1.7.3+dfsg-3"
        },
        {
            "binary_name": "ruby-rails",
            "binary_version": "2:6.1.7.3+dfsg-3"
        },
        {
            "binary_name": "ruby-railties",
            "binary_version": "2:6.1.7.3+dfsg-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126071.json"
Ubuntu:26.04:LTS
rails

Package

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

Affected ranges

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

Affected versions

2:7.*
2:7.2.2.1+dfsg-7
2:7.2.2.2+dfsg-2
2:7.2.3+dfsg-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rails",
            "binary_version": "2:7.2.3+dfsg-2"
        },
        {
            "binary_name": "ruby-actioncable",
            "binary_version": "2:7.2.3+dfsg-2"
        },
        {
            "binary_name": "ruby-actionmailbox",
            "binary_version": "2:7.2.3+dfsg-2"
        },
        {
            "binary_name": "ruby-actionmailer",
            "binary_version": "2:7.2.3+dfsg-2"
        },
        {
            "binary_name": "ruby-actionpack",
            "binary_version": "2:7.2.3+dfsg-2"
        },
        {
            "binary_name": "ruby-actiontext",
            "binary_version": "2:7.2.3+dfsg-2"
        },
        {
            "binary_name": "ruby-actionview",
            "binary_version": "2:7.2.3+dfsg-2"
        },
        {
            "binary_name": "ruby-activejob",
            "binary_version": "2:7.2.3+dfsg-2"
        },
        {
            "binary_name": "ruby-activemodel",
            "binary_version": "2:7.2.3+dfsg-2"
        },
        {
            "binary_name": "ruby-activerecord",
            "binary_version": "2:7.2.3+dfsg-2"
        },
        {
            "binary_name": "ruby-activestorage",
            "binary_version": "2:7.2.3+dfsg-2"
        },
        {
            "binary_name": "ruby-activesupport",
            "binary_version": "2:7.2.3+dfsg-2"
        },
        {
            "binary_name": "ruby-rails",
            "binary_version": "2:7.2.3+dfsg-2"
        },
        {
            "binary_name": "ruby-railties",
            "binary_version": "2:7.2.3+dfsg-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126071.json"
Ubuntu:26.10
rails

Package

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

Affected ranges

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

Affected versions

2:7.*
2:7.2.3+dfsg-2
2:7.2.3.2+dfsg-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rails",
            "binary_version": "2:7.2.3.2+dfsg-2"
        },
        {
            "binary_name": "ruby-actioncable",
            "binary_version": "2:7.2.3.2+dfsg-2"
        },
        {
            "binary_name": "ruby-actionmailbox",
            "binary_version": "2:7.2.3.2+dfsg-2"
        },
        {
            "binary_name": "ruby-actionmailer",
            "binary_version": "2:7.2.3.2+dfsg-2"
        },
        {
            "binary_name": "ruby-actionpack",
            "binary_version": "2:7.2.3.2+dfsg-2"
        },
        {
            "binary_name": "ruby-actiontext",
            "binary_version": "2:7.2.3.2+dfsg-2"
        },
        {
            "binary_name": "ruby-actionview",
            "binary_version": "2:7.2.3.2+dfsg-2"
        },
        {
            "binary_name": "ruby-activejob",
            "binary_version": "2:7.2.3.2+dfsg-2"
        },
        {
            "binary_name": "ruby-activemodel",
            "binary_version": "2:7.2.3.2+dfsg-2"
        },
        {
            "binary_name": "ruby-activerecord",
            "binary_version": "2:7.2.3.2+dfsg-2"
        },
        {
            "binary_name": "ruby-activestorage",
            "binary_version": "2:7.2.3.2+dfsg-2"
        },
        {
            "binary_name": "ruby-activesupport",
            "binary_version": "2:7.2.3.2+dfsg-2"
        },
        {
            "binary_name": "ruby-rails",
            "binary_version": "2:7.2.3.2+dfsg-2"
        },
        {
            "binary_name": "ruby-railties",
            "binary_version": "2:7.2.3.2+dfsg-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126071.json"
Ubuntu:Pro:16.04:LTS
rails

Package

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

Affected ranges

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

Affected versions

2:4.*
2:4.1.10-1
2:4.2.5-1
2:4.2.5.1-1
2:4.2.5.2-2
2:4.2.6-1
2:4.2.6-1ubuntu0.1~esm1
2:4.2.6-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rails",
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "ruby-actionmailer",
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "ruby-actionpack",
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "ruby-actionview",
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "ruby-activejob",
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "ruby-activemodel",
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "ruby-activerecord",
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "ruby-activesupport",
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "ruby-rails",
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "ruby-railties",
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126071.json"
Ubuntu:Pro:18.04:LTS
rails

Package

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

Affected ranges

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

Affected versions

2:4.*
2:4.2.9-2
2:4.2.9-4
2:4.2.10-0ubuntu4
2:4.2.10-0ubuntu4+esm1
2:4.2.10-0ubuntu4+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rails",
            "binary_version": "2:4.2.10-0ubuntu4+esm2"
        },
        {
            "binary_name": "ruby-actionmailer",
            "binary_version": "2:4.2.10-0ubuntu4+esm2"
        },
        {
            "binary_name": "ruby-actionpack",
            "binary_version": "2:4.2.10-0ubuntu4+esm2"
        },
        {
            "binary_name": "ruby-actionview",
            "binary_version": "2:4.2.10-0ubuntu4+esm2"
        },
        {
            "binary_name": "ruby-activejob",
            "binary_version": "2:4.2.10-0ubuntu4+esm2"
        },
        {
            "binary_name": "ruby-activemodel",
            "binary_version": "2:4.2.10-0ubuntu4+esm2"
        },
        {
            "binary_name": "ruby-activerecord",
            "binary_version": "2:4.2.10-0ubuntu4+esm2"
        },
        {
            "binary_name": "ruby-activesupport",
            "binary_version": "2:4.2.10-0ubuntu4+esm2"
        },
        {
            "binary_name": "ruby-rails",
            "binary_version": "2:4.2.10-0ubuntu4+esm2"
        },
        {
            "binary_name": "ruby-railties",
            "binary_version": "2:4.2.10-0ubuntu4+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126071.json"
Ubuntu:Pro:20.04:LTS
rails

Package

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

Affected ranges

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

Affected versions

2:5.*
2:5.2.2.1+dfsg-1ubuntu1
2:5.2.3+dfsg-3
2:5.2.3+dfsg-3ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rails",
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "ruby-actioncable",
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "ruby-actionmailer",
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "ruby-actionpack",
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "ruby-actionview",
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "ruby-activejob",
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "ruby-activemodel",
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "ruby-activerecord",
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "ruby-activestorage",
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "ruby-activesupport",
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "ruby-rails",
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "ruby-railties",
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126071.json"
Ubuntu:Pro:22.04:LTS
rails

Package

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

Affected ranges

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

Affected versions

2:6.*
2:6.0.3.7+dfsg-2
2:6.1.4.1+dfsg-8ubuntu2
2:6.1.4.1+dfsg-8ubuntu2+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rails",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
        },
        {
            "binary_name": "ruby-actioncable",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
        },
        {
            "binary_name": "ruby-actionmailbox",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
        },
        {
            "binary_name": "ruby-actionmailer",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
        },
        {
            "binary_name": "ruby-actionpack",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
        },
        {
            "binary_name": "ruby-actiontext",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
        },
        {
            "binary_name": "ruby-actionview",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
        },
        {
            "binary_name": "ruby-activejob",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
        },
        {
            "binary_name": "ruby-activemodel",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
        },
        {
            "binary_name": "ruby-activerecord",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
        },
        {
            "binary_name": "ruby-activestorage",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
        },
        {
            "binary_name": "ruby-activesupport",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
        },
        {
            "binary_name": "ruby-rails",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
        },
        {
            "binary_name": "ruby-railties",
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126071.json"