UBUNTU-CVE-2026-34830

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Source

https://ubuntu.com/security/CVE-2026-34830

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34830.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-34830

Upstream

CVE-2026-34830

Downstream

USN-8182-1

Published

2026-04-02T17:16:00Z

Modified

2026-04-17T10:34:54.457532Z

Severity

5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N 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::Sendfile#mapaccelpath interpolates the value of the X-Accel-Mapping request header directly into a regular expression when rewriting file paths for X-Accel-Redirect. Because the header value is not escaped, an attacker who can supply X-Accel-Mapping to the backend can inject regex metacharacters and control the generated X-Accel-Redirect response header. In deployments using Rack::Sendfile with x-accel-redirect, this can allow an attacker to cause nginx to serve unintended files from configured internal locations. 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-2026-34830.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-2026-34830.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-2026-34830.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-2026-34830.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-2026-34830.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-2026-34830.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-2026-34830.json"