UBUNTU-CVE-2026-33349

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Source
https://ubuntu.com/security/CVE-2026-33349
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33349.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-33349
Upstream
Published
2026-03-24T20:16:00Z
Modified
2026-04-27T19:02:28.526053Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks. From version 4.0.0-beta.3 to before version 5.5.7, the DocTypeReader in fast-xml-parser uses JavaScript truthy checks to evaluate maxEntityCount and maxEntitySize configuration limits. When a developer explicitly sets either limit to 0 — intending to disallow all entities or restrict entity size to zero bytes — the falsy nature of 0 in JavaScript causes the guard conditions to short-circuit, completely bypassing the limits. An attacker who can supply XML input to such an application can trigger unbounded entity expansion, leading to memory exhaustion and denial of service. This issue has been patched in version 5.5.7.

References

Affected packages

Ubuntu:24.04:LTS / node-webfont

Package

Name
node-webfont
Purl
pkg:deb/ubuntu/node-webfont@11.4.0+dfsg2+~cs35.7.26-7ubuntu1?arch=source&distro=noble

Affected ranges

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

Affected versions

11.*
11.4.0+dfsg2+~cs35.7.26-7ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-webfont",
            "binary_version": "11.4.0+dfsg2+~cs35.7.26-7ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33349.json"

Ubuntu:25.10 / node-webfont

Package

Name
node-webfont
Purl
pkg:deb/ubuntu/node-webfont@11.4.0+dfsg2+~cs35.7.26-13ubuntu2?arch=source&distro=questing

Affected ranges

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

Affected versions

11.*
11.4.0+dfsg2+~cs35.7.26-10
11.4.0+dfsg2+~cs35.7.26-13ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-webfont",
            "binary_version": "11.4.0+dfsg2+~cs35.7.26-13ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33349.json"

Ubuntu:26.04 / node-webfont

Package

Name
node-webfont
Purl
pkg:deb/ubuntu/node-webfont@11.4.0+dfsg2+~cs35.7.26-18?arch=source&distro=resolute

Affected ranges

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

Affected versions

11.*
11.4.0+dfsg2+~cs35.7.26-13ubuntu2
11.4.0+dfsg2+~cs35.7.26-14
11.4.0+dfsg2+~cs35.7.26-15
11.4.0+dfsg2+~cs35.7.26-16build1
11.4.0+dfsg2+~cs35.7.26-18

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-webfont",
            "binary_version": "11.4.0+dfsg2+~cs35.7.26-18"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33349.json"