USN-9059-1

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Source
https://ubuntu.com/security/notices/USN-9059-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-9059-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-9059-1
Upstream
Related
Published
2026-11-11T18:33:24Z
Modified
2026-11-12T17:29:27Z
Summary
ruby-jwt vulnerability
Details

It was discovered that ruby-jwt incorrectly verified HMAC signatures when the verification key was empty or missing. A remote attacker could possibly use this issue to forge tokens and bypass authentication.

References

Affected packages

Ubuntu:24.04:LTS
ruby-jwt

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.7.1-1+deb13u1build0.24.04.1

Affected versions

2.*
2.7.0-2
2.7.1-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "ruby-jwt",
            "binary_version": "2.7.1-1+deb13u1build0.24.04.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-45363",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-9059-1.json"
Ubuntu:26.04:LTS
ruby-jwt

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.7.1-1+deb13u1build0.26.04.1

Affected versions

2.*
2.7.1-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "ruby-jwt",
            "binary_version": "2.7.1-1+deb13u1build0.26.04.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-45363",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-9059-1.json"
Ubuntu:Pro:16.04:LTS
ruby-jwt

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.0-3ubuntu0.1~esm1

Affected versions

1.*
1.0.0-3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "ruby-jwt",
            "binary_version": "1.0.0-3ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-45363",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:16.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-9059-1.json"
Ubuntu:Pro:18.04:LTS
ruby-jwt

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.5.6-1ubuntu0.1~esm1

Affected versions

1.*
1.5.6-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "ruby-jwt",
            "binary_version": "1.5.6-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-45363",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:18.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-9059-1.json"
Ubuntu:Pro:20.04:LTS
ruby-jwt

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.1.0-2ubuntu0.1~esm1

Affected versions

1.*
1.5.6-1
2.*
2.1.0-2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "ruby-jwt",
            "binary_version": "2.1.0-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-45363",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:20.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-9059-1.json"
Ubuntu:Pro:22.04:LTS
ruby-jwt

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.2.2-1ubuntu0.1~esm1

Affected versions

2.*
2.2.2-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "ruby-jwt",
            "binary_version": "2.2.2-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-45363",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-9059-1.json"