UBUNTU-CVE-2026-18784

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Source
https://ubuntu.com/security/CVE-2026-18784
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18784.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-18784
Upstream
Published
2026-08-04T17:16:00Z
Modified
2026-08-06T03:08:40.404637264Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
  • 1.9 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A vulnerability was found in o6 open62541 up to 1.5.5. This issue affects the function UAClientreadNodeClassAttribute of the file src/client/uaclienthighlevel.c. Performing a manipulation results in heap-based buffer overflow. Attacking locally is a requirement. The exploit has been made public and could be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.

References

Affected packages

Ubuntu:26.04:LTS / open62541

Package

Name
open62541
Purl
pkg:deb/ubuntu/open62541?arch=source&distro=resolute

Affected ranges

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

Affected versions

1.*
1.4.11.1-1
1.4.11.1-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libopen62541-1.4",
            "binary_version": "1.4.11.1-1build1"
        },
        {
            "binary_name": "libopen62541-1.4-tools",
            "binary_version": "1.4.11.1-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18784.json"