UBUNTU-CVE-2026-34826

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Source

https://ubuntu.com/security/CVE-2026-34826

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34826.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-34826

Upstream

CVE-2026-34826

Downstream

USN-8182-1

Published

2026-04-02T17:16:00Z

Modified

2026-04-17T10:36:06.470980Z

Severity

5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Utils.getbyteranges parses the HTTP Range header without limiting the number of individual byte ranges. Although the existing fix for CVE-2024-26141 rejects ranges whose total byte coverage exceeds the file size, it does not restrict the count of ranges. An attacker can supply many small overlapping ranges such as 0-0,0-0,0-0,... to trigger disproportionate CPU, memory, I/O, and bandwidth consumption per request. This results in a denial of service condition in Rack file-serving paths that process multipart byte range responses. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.

References

Affected packages

Ubuntu:24.04:LTS

ruby-rack

Package

Name: ruby-rack
Purl: pkg:deb/ubuntu/ruby-rack@2.2.7-1ubuntu0.7?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown 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_version": "2.2.7-1ubuntu0.7",
            "binary_name": "ruby-rack"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34826.json"

Ubuntu:25.10

ruby-rack

Package

Name: ruby-rack
Purl: pkg:deb/ubuntu/ruby-rack@3.1.16-0.1ubuntu0.3?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.2.7-1.1

3.*

3.1.16-0.1

3.1.16-0.1ubuntu0.1

3.1.16-0.1ubuntu0.2

3.1.16-0.1ubuntu0.3

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3.1.16-0.1ubuntu0.3",
            "binary_name": "ruby-rack"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34826.json"

Ubuntu:Pro:14.04:LTS

ruby-rack

Package

Name: ruby-rack
Purl: pkg:deb/ubuntu/ruby-rack@1.5.2-3+deb8u3ubuntu1~esm11?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown 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_version": "1.5.2-3+deb8u3ubuntu1~esm11",
            "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"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34826.json"

Ubuntu:Pro:16.04:LTS

ruby-rack

Package

Name: ruby-rack
Purl: pkg:deb/ubuntu/ruby-rack@1.6.4-3ubuntu0.2+esm10?arch=source&distro=esm-apps/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown 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_version": "1.6.4-3ubuntu0.2+esm10",
            "binary_name": "ruby-rack"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34826.json"

Ubuntu:Pro:18.04:LTS

ruby-rack

Package

Name: ruby-rack
Purl: pkg:deb/ubuntu/ruby-rack@1.6.4-4ubuntu0.2+esm10?arch=source&distro=esm-apps/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown 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_version": "1.6.4-4ubuntu0.2+esm10",
            "binary_name": "ruby-rack"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34826.json"

Ubuntu:Pro:20.04:LTS

ruby-rack

Package

Name: ruby-rack
Purl: pkg:deb/ubuntu/ruby-rack@2.0.7-2ubuntu0.1+esm10?arch=source&distro=esm-apps/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown 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_version": "2.0.7-2ubuntu0.1+esm10",
            "binary_name": "ruby-rack"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34826.json"

Ubuntu:Pro:22.04:LTS

ruby-rack

Package

Name: ruby-rack
Purl: pkg:deb/ubuntu/ruby-rack@2.1.4-5ubuntu1.2+esm3?arch=source&distro=esm-apps/jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown 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_version": "2.1.4-5ubuntu1.2+esm3",
            "binary_name": "ruby-rack"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34826.json"