Vulnerability · Published Mar 24, 2026 · Assigned by KNIME
CVE-2026-4649Auth bypass in Apache Artemis allows reading all internal messages
Medium 5.3
In plain English
A medium-severity missing authentication in KNIME Business Hub from KNIME. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).
Official description
Apache Artemis before version 2.52.0 is affected by an authentication bypass flaw which allows reading all messages exchanged via the broker and injection of new message ( CVE-2026-27446 https://www.cve.org/CVERecord ). Since KNIME Business Hub uses Apache Artemis it is also affected by the issue. However, since Apache Artemis is not exposed to the outside it requires at least normal user privileges and the ability to execute workflows in an executor. Such a user can install and register a federated mirror without authentication to the original Apache Artemis instance and thereby read all internal messages and inject new messages. The issue affects all versions of KNIME Business Hub. A fixed version of Apache Artemis is shipped with versions 1.18.0, 1.17.4, and 1.16.3. We recommend updating to a fixed version as soon as possible since no workaround is known.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | artemis | no fix listed | UBUNTU-CVE-2026-4649 |
| Ubuntu:24.04:LTS | artemis | no fix listed | UBUNTU-CVE-2026-4649 |
| Ubuntu:25.10 | artemis | no fix listed | UBUNTU-CVE-2026-4649 |
| Ubuntu:26.04:LTS | artemis | no fix listed | UBUNTU-CVE-2026-4649 |
| Ubuntu:26.10 | artemis | no fix listed | UBUNTU-CVE-2026-4649 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| KNIME | KNIME Business Hub | 1.17.0 – before 1.17.41.16.0 – before 1.16.30.0.0 – before 1.15.2 |
Weakness: CWE-306 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/AU:Y/R:U/V:C/RE:M/U:Amber