UBUNTU-CVE-2026-42246

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Source
https://ubuntu.com/security/CVE-2026-42246
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-42246
Upstream
Downstream
Related
Published
2026-05-09T20:16:00Z
Modified
2026-07-06T16:02:59Z
Severity
  • 7.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to return "successfully", without starting TLS. This issue has been patched in versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4.

References

Affected packages

Ubuntu:16.04:LTS
jruby

Package

Name
jruby
Purl
pkg:deb/ubuntu/jruby?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*
1.7.21-2ubuntu4
1.7.22-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "jruby",
            "binary_version": "1.7.22-1ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json"
Ubuntu:18.04:LTS
jruby

Package

Name
jruby
Purl
pkg:deb/ubuntu/jruby?arch=source&distro=bionic

Affected ranges

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

Affected versions

9.*
9.1.13.0-1
9.1.17.0-1~18.04

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "jruby",
            "binary_version": "9.1.17.0-1~18.04"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json"
Ubuntu:20.04:LTS
jruby

Package

Name
jruby
Purl
pkg:deb/ubuntu/jruby?arch=source&distro=focal

Affected ranges

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

Affected versions

9.*
9.1.17.0-3
9.1.17.0-3build5
9.1.17.0-3build6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "jruby",
            "binary_version": "9.1.17.0-3build6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json"
Ubuntu:22.04:LTS
ruby3.0

Package

Name
ruby3.0
Purl
pkg:deb/ubuntu/ruby3.0?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.0.2-7ubuntu2.13

Affected versions

3.*
3.0.2-5ubuntu1
3.0.2-7
3.0.2-7ubuntu2
3.0.2-7ubuntu2.1
3.0.2-7ubuntu2.2
3.0.2-7ubuntu2.3
3.0.2-7ubuntu2.4
3.0.2-7ubuntu2.5
3.0.2-7ubuntu2.6
3.0.2-7ubuntu2.7
3.0.2-7ubuntu2.8
3.0.2-7ubuntu2.10
3.0.2-7ubuntu2.11
3.0.2-7ubuntu2.12

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libruby3.0",
            "binary_version": "3.0.2-7ubuntu2.13"
        },
        {
            "binary_name": "ruby3.0",
            "binary_version": "3.0.2-7ubuntu2.13"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json"
Ubuntu:24.04:LTS
jruby

Package

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

Affected ranges

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

Affected versions

9.*
9.3.9.0+ds-1
9.4.5.0+ds-1
9.4.5.0+ds-1ubuntu1
9.4.6.0+ds-1ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "jruby",
            "binary_version": "9.4.6.0+ds-1ubuntu3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json"
ruby3.2

Package

Name
ruby3.2
Purl
pkg:deb/ubuntu/ruby3.2?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.2.3-1ubuntu0.24.04.8

Affected versions

3.*
3.2.3-1
3.2.3-1build2
3.2.3-1build3
3.2.3-1ubuntu0.24.04.1
3.2.3-1ubuntu0.24.04.3
3.2.3-1ubuntu0.24.04.5
3.2.3-1ubuntu0.24.04.6
3.2.3-1ubuntu0.24.04.7

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libruby3.2",
            "binary_version": "3.2.3-1ubuntu0.24.04.8"
        },
        {
            "binary_name": "ruby3.2",
            "binary_version": "3.2.3-1ubuntu0.24.04.8"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json"
Ubuntu:25.10
jruby

Package

Name
jruby
Purl
pkg:deb/ubuntu/jruby?arch=source&distro=questing

Affected ranges

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

Affected versions

9.*
9.4.8.0+ds-2ubuntu1
9.4.8.0+ds-3ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "jruby",
            "binary_version": "9.4.8.0+ds-3ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json"
ruby3.3

Package

Name
ruby3.3
Purl
pkg:deb/ubuntu/ruby3.3?arch=source&distro=questing

Affected ranges

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

Affected versions

3.*
3.3.7-1ubuntu2
3.3.8-2ubuntu1
3.3.8-2ubuntu2
3.3.8-2ubuntu2.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libruby3.3",
            "binary_version": "3.3.8-2ubuntu2.1"
        },
        {
            "binary_name": "ruby3.3",
            "binary_version": "3.3.8-2ubuntu2.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json"
Ubuntu:26.04:LTS
jruby

Package

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

Affected ranges

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

Affected versions

9.*
9.4.8.0+ds-3ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "jruby",
            "binary_version": "9.4.8.0+ds-3ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json"
ruby3.3

Package

Name
ruby3.3
Purl
pkg:deb/ubuntu/ruby3.3?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.3.8-2ubuntu3.1

Affected versions

3.*
3.3.8-2ubuntu2
3.3.8-2ubuntu3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libruby3.3",
            "binary_version": "3.3.8-2ubuntu3.1"
        },
        {
            "binary_name": "ruby3.3",
            "binary_version": "3.3.8-2ubuntu3.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json"
Ubuntu:Pro:14.04:LTS
jruby

Package

Name
jruby
Purl
pkg:deb/ubuntu/jruby?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.*
1.5.6-5ubuntu1
1.5.6-6
1.5.6-7
1.5.6-9+deb8u2build0.14.04.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "jruby",
            "binary_version": "1.5.6-9+deb8u2build0.14.04.1~esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json"
Ubuntu:Pro:16.04:LTS
ruby2.3

Package

Name
ruby2.3
Purl
pkg:deb/ubuntu/ruby2.3?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.3.1-2~ubuntu16.04.16+esm14

Affected versions

2.*
2.3.0-1
2.3.0-2
2.3.0-4ubuntu2
2.3.0-4ubuntu3
2.3.0-5ubuntu1
2.3.1-2~16.04
2.3.1-2~16.04.2
2.3.1-2~16.04.4
2.3.1-2~16.04.5
2.3.1-2~16.04.6
2.3.1-2~16.04.7
2.3.1-2~16.04.9
2.3.1-2~16.04.10
2.3.1-2~16.04.11
2.3.1-2~16.04.12
2.3.1-2~ubuntu16.04.13
2.3.1-2~ubuntu16.04.14
2.3.1-2~ubuntu16.04.15
2.3.1-2~ubuntu16.04.16
2.3.1-2~ubuntu16.04.16+esm1
2.3.1-2~ubuntu16.04.16+esm2
2.3.1-2~ubuntu16.04.16+esm3
2.3.1-2~ubuntu16.04.16+esm4
2.3.1-2~ubuntu16.04.16+esm5
2.3.1-2~ubuntu16.04.16+esm6
2.3.1-2~ubuntu16.04.16+esm7
2.3.1-2~ubuntu16.04.16+esm8
2.3.1-2~ubuntu16.04.16+esm9
2.3.1-2~ubuntu16.04.16+esm10
2.3.1-2~ubuntu16.04.16+esm11
2.3.1-2~ubuntu16.04.16+esm12

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libruby2.3",
            "binary_version": "2.3.1-2~ubuntu16.04.16+esm14"
        },
        {
            "binary_name": "ruby2.3",
            "binary_version": "2.3.1-2~ubuntu16.04.16+esm14"
        },
        {
            "binary_name": "ruby2.3-tcltk",
            "binary_version": "2.3.1-2~ubuntu16.04.16+esm14"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json"
Ubuntu:Pro:18.04:LTS
ruby2.5

Package

Name
ruby2.5
Purl
pkg:deb/ubuntu/ruby2.5?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.5.1-1ubuntu1.16+esm8

Affected versions

2.*
2.5.0~preview1-1ubuntu2
2.5.0-4ubuntu1
2.5.0-4ubuntu4
2.5.0-5ubuntu1
2.5.0-6ubuntu1
2.5.1-1ubuntu1
2.5.1-1ubuntu1.1
2.5.1-1ubuntu1.2
2.5.1-1ubuntu1.4
2.5.1-1ubuntu1.5
2.5.1-1ubuntu1.6
2.5.1-1ubuntu1.7
2.5.1-1ubuntu1.8
2.5.1-1ubuntu1.9
2.5.1-1ubuntu1.10
2.5.1-1ubuntu1.11
2.5.1-1ubuntu1.12
2.5.1-1ubuntu1.13
2.5.1-1ubuntu1.14
2.5.1-1ubuntu1.15
2.5.1-1ubuntu1.16
2.5.1-1ubuntu1.16+esm1
2.5.1-1ubuntu1.16+esm3
2.5.1-1ubuntu1.16+esm4
2.5.1-1ubuntu1.16+esm5
2.5.1-1ubuntu1.16+esm6
2.5.1-1ubuntu1.16+esm7

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libruby2.5",
            "binary_version": "2.5.1-1ubuntu1.16+esm8"
        },
        {
            "binary_name": "ruby2.5",
            "binary_version": "2.5.1-1ubuntu1.16+esm8"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json"
Ubuntu:Pro:20.04:LTS
ruby2.7

Package

Name
ruby2.7
Purl
pkg:deb/ubuntu/ruby2.7?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.7.0-5ubuntu1.18+esm5

Affected versions

2.*
2.7.0-1
2.7.0-2
2.7.0-3
2.7.0-4
2.7.0-4ubuntu1
2.7.0-5ubuntu1
2.7.0-5ubuntu1.1
2.7.0-5ubuntu1.2
2.7.0-5ubuntu1.3
2.7.0-5ubuntu1.4
2.7.0-5ubuntu1.5
2.7.0-5ubuntu1.6
2.7.0-5ubuntu1.7
2.7.0-5ubuntu1.8
2.7.0-5ubuntu1.9
2.7.0-5ubuntu1.10
2.7.0-5ubuntu1.11
2.7.0-5ubuntu1.12
2.7.0-5ubuntu1.13
2.7.0-5ubuntu1.14
2.7.0-5ubuntu1.15
2.7.0-5ubuntu1.16
2.7.0-5ubuntu1.17
2.7.0-5ubuntu1.18
2.7.0-5ubuntu1.18+esm1
2.7.0-5ubuntu1.18+esm3
2.7.0-5ubuntu1.18+esm4

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libruby2.7",
            "binary_version": "2.7.0-5ubuntu1.18+esm5"
        },
        {
            "binary_name": "ruby2.7",
            "binary_version": "2.7.0-5ubuntu1.18+esm5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42246.json"