UBUNTU-CVE-2026-15554

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Source
https://ubuntu.com/security/CVE-2026-15554
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15554.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-15554
Upstream
  • CVE-2026-15554
Published
2026-08-13T00:00:00Z
Modified
2026-08-13T19:30:10.073295285Z
Severity
  • 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

the Undertow AJP listener honours forged sslcert and isssl AJP attributes without requiring any shared-secret authentication. This enables an unauthenticated attacker with direct TCP access to port 8009 to bypass CLIENT-CERT authentication by injecting a forged X.509 certificate via the AJP protocol.

References

Affected packages

Ubuntu:26.04:LTS
undertow

Package

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

Affected ranges

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

Affected versions

2.*
2.3.18-2
2.3.20-1
2.3.20-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.3.20-1ubuntu1",
            "binary_name": "libundertow-java"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15554.json"
Ubuntu:Pro:16.04:LTS
undertow

Package

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

Affected ranges

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

Affected versions

1.*
1.3.4-1
1.3.5-1
1.3.7-1
1.3.11-1
1.3.16-1
1.3.16-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3.16-1ubuntu0.1~esm1",
            "binary_name": "libundertow-java"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15554.json"
Ubuntu:Pro:18.04:LTS
undertow

Package

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

Affected ranges

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

Affected versions

1.*
1.4.20-1
1.4.21-1
1.4.22-1
1.4.23-1
1.4.23-2build1
1.4.23-3
1.4.23-3ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.4.23-3ubuntu0.1~esm1",
            "binary_name": "libundertow-java"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15554.json"
Ubuntu:Pro:20.04:LTS
undertow

Package

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

Affected ranges

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

Affected versions

2.*
2.0.23-1
2.0.27-1
2.0.28-1
2.0.29-1
2.0.29-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.0.29-1ubuntu0.1~esm1",
            "binary_name": "libundertow-java"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15554.json"
Ubuntu:Pro:22.04:LTS
undertow

Package

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

Affected ranges

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

Affected versions

2.*
2.2.8-1
2.2.12-1
2.2.13-1
2.2.14-1
2.2.16-1
2.2.16-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.2.16-1ubuntu0.1~esm1",
            "binary_name": "libundertow-java"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15554.json"
Ubuntu:Pro:24.04:LTS
undertow

Package

Name
undertow
Purl
pkg:deb/ubuntu/undertow?arch=source&distro=esm-apps%2Fnoble

Affected ranges

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

Affected versions

2.*
2.3.8-2
2.3.8-2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.3.8-2ubuntu0.1~esm1",
            "binary_name": "libundertow-java"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15554.json"