UBUNTU-CVE-2026-34481

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Source
https://ubuntu.com/security/CVE-2026-34481
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-34481
Upstream
Published
2026-04-10T16:16:00Z
Modified
2026-07-15T19:45:50.508339577Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Apache Log4j's JsonTemplateLayout https://logging.apache.org/log4j/2.x/manual/json-template-layout.html , in versions up to and including 2.25.3, produces invalid JSON output when log events contain non-finite floating-point values (NaN, Infinity, or -Infinity), which are prohibited by RFC 8259. This may cause downstream log processing systems to reject or fail to index affected records. An attacker can exploit this issue only if both of the following conditions are met: * The application uses JsonTemplateLayout. * The application logs a MapMessage, or logs an object directly (e.g., via Logger.info(Object), which wraps it in an ObjectMessage), where the message contains an attacker-controlled floating-point value. Users are advised to upgrade to Apache Log4j JSON Template Layout 2.25.4, which corrects this issue. Note: The fix released in version 2.25.4 did not cover all affected code paths. CVE-2026-49844 was assigned to the remaining issue, which concerns the MapMessage.asJson() serialization in Apache Log4j API and is fixed in versions 2.25.5 and 2.26.1.

References

Affected packages

Ubuntu:18.04:LTS
apache-log4j1.2

Package

Name
apache-log4j1.2
Purl
pkg:deb/ubuntu/apache-log4j1.2?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.2.17-7ubuntu2
1.2.17-8
1.2.17-8+deb10u1build0.18.04.1
1.2.17-8+deb10u1ubuntu0.1
1.2.17-8+deb10u1ubuntu0.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j1.2-java",
            "binary_version": "1.2.17-8+deb10u1ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"
apache-log4j2

Package

Name
apache-log4j2
Purl
pkg:deb/ubuntu/apache-log4j2?arch=source&distro=bionic

Affected ranges

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

Affected versions

2.*
2.8.2-1
2.8.2-2
2.10.0-1
2.10.0-2
2.10.0-2ubuntu0.1
2.12.4-0ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j2-java",
            "binary_version": "2.12.4-0ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"
Ubuntu:20.04:LTS
apache-log4j1.2

Package

Name
apache-log4j1.2
Purl
pkg:deb/ubuntu/apache-log4j1.2?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*
1.2.17-8
1.2.17-9
1.2.17-9ubuntu0.1
1.2.17-9ubuntu0.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j1.2-java",
            "binary_version": "1.2.17-9ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"
apache-log4j2

Package

Name
apache-log4j2
Purl
pkg:deb/ubuntu/apache-log4j2?arch=source&distro=focal

Affected ranges

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

Affected versions

2.*
2.11.1-2
2.11.2-1
2.15.0-0.20.04.1
2.16.0-0.20.04.1
2.17.0-0.20.04.1
2.17.1-0.20.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j2-java",
            "binary_version": "2.17.1-0.20.04.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"
Ubuntu:22.04:LTS
apache-log4j1.2

Package

Name
apache-log4j1.2
Purl
pkg:deb/ubuntu/apache-log4j1.2?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
1.2.17-10
1.2.17-11

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j1.2-java",
            "binary_version": "1.2.17-11"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"
apache-log4j2

Package

Name
apache-log4j2
Purl
pkg:deb/ubuntu/apache-log4j2?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*
2.13.3-1
2.15.0-1
2.16.0-1
2.17.0-1
2.17.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j2-java",
            "binary_version": "2.17.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"
Ubuntu:24.04:LTS
apache-log4j1.2

Package

Name
apache-log4j1.2
Purl
pkg:deb/ubuntu/apache-log4j1.2?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*
1.2.17-11

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j1.2-java",
            "binary_version": "1.2.17-11"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"
apache-log4j2

Package

Name
apache-log4j2
Purl
pkg:deb/ubuntu/apache-log4j2?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.19.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j2-java",
            "binary_version": "2.19.0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"
Ubuntu:25.10
apache-log4j1.2

Package

Name
apache-log4j1.2
Purl
pkg:deb/ubuntu/apache-log4j1.2?arch=source&distro=questing

Affected ranges

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

Affected versions

1.*
1.2.17-11

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j1.2-java",
            "binary_version": "1.2.17-11"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"
apache-log4j2

Package

Name
apache-log4j2
Purl
pkg:deb/ubuntu/apache-log4j2?arch=source&distro=questing

Affected ranges

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

Affected versions

2.*
2.19.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j2-java",
            "binary_version": "2.19.0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"
Ubuntu:26.04:LTS
apache-log4j1.2

Package

Name
apache-log4j1.2
Purl
pkg:deb/ubuntu/apache-log4j1.2?arch=source&distro=resolute

Affected ranges

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

Affected versions

1.*
1.2.17-11
1.2.17-11build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j1.2-java",
            "binary_version": "1.2.17-11build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"
apache-log4j2

Package

Name
apache-log4j2
Purl
pkg:deb/ubuntu/apache-log4j2?arch=source&distro=resolute

Affected ranges

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

Affected versions

2.*
2.19.0-2
2.19.0-2build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j2-java",
            "binary_version": "2.19.0-2build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"
Ubuntu:Pro:14.04:LTS
apache-log4j1.2

Package

Name
apache-log4j1.2
Purl
pkg:deb/ubuntu/apache-log4j1.2?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

1.*
1.2.17-3ubuntu1
1.2.17-4ubuntu1
1.2.17-4ubuntu2
1.2.17-4ubuntu3
1.2.17-4ubuntu3+esm1
1.2.17-4ubuntu3+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j1.2-java",
            "binary_version": "1.2.17-4ubuntu3+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"
Ubuntu:Pro:16.04:LTS
apache-log4j2

Package

Name
apache-log4j2
Purl
pkg:deb/ubuntu/apache-log4j2?arch=source&distro=esm-apps%2Fxenial

Affected ranges

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

Affected versions

2.*
2.2-1
2.4-1
2.4-2
2.4-2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j2-java",
            "binary_version": "2.4-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"
apache-log4j1.2

Package

Name
apache-log4j1.2
Purl
pkg:deb/ubuntu/apache-log4j1.2?arch=source&distro=esm-apps%2Fxenial

Affected ranges

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

Affected versions

1.*
1.2.17-6ubuntu1
1.2.17-7ubuntu1
1.2.17-7ubuntu1+esm1
1.2.17-7ubuntu1+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblog4j1.2-java",
            "binary_version": "1.2.17-7ubuntu1+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34481.json"