UBUNTU-CVE-2026-14180

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Source
https://ubuntu.com/security/CVE-2026-14180
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14180.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-14180
Upstream
  • CVE-2026-14180
Published
2026-08-13T00:00:00Z
Modified
2026-08-13T19:30:13.105918743Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in the ChunkReader component of the Undertow HTTP server, which is used by WildFly and JBoss EAP to handle chunked transfer encoding. The issue occurs because the parser uses a single internal variable to store both the remaining chunk size and state flags. By sending a specially crafted request with an extremely large chunk size, an attacker can cause these values to overlap, tricking the parser into thinking a request has finished prematurely. This can allow a second, "smuggled" request to be processed out of sync, potentially bypassing security controls.

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-2026-14180.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-2026-14180.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-2026-14180.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-2026-14180.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-2026-14180.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-2026-14180.json"