CVE-2026-6264: Talend JobServer and Runtime JMX Monitoring Port Unauthenticated Remote Code Execution
CVE-2026-6264 is a critical flaw in Talend JobServer and Talend Runtime that, according to the record, allows unauthenticated remote code execution through the JMX monitoring port. The CNA-assigned CVSS 3.1 base score is 9.8, and the record describes mitigations including TLS client authentication on the monitoring port and disabling that port, while stating that the patch is required for full mitigation. No confirmed exploitation appears in the sources consulted, and the record does not list affected or fixed versions.
Overview
CVE-2026-6264 affects the Talend JobServer and Talend Runtime products. The record describes a critical issue that allows remote code execution without authentication through the JMX monitoring port. The vendor-linked reference in the record is a Qlik community support article about a critical security fix for Qlik Talend JobServer and Talend products.
Impact
The CNA-assigned CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, which corresponds to a network-reachable flaw requiring no privileges and no user interaction, with high impact to confidentiality, integrity and availability. The record does not provide a weakness classification (CWE), so the specific vulnerability class is unknown beyond the description of remote code execution.
Affected products and versions
- Talend JobServer, via its JMX monitoring port.
- Talend Runtime, as named in the record.
- The record does not list affected version ranges or fixed versions. The statement that the patch is required for full mitigation and that the JobServer JMX monitoring port is disabled by default from the R2024-07-RT patch is the only version-related information available.
Exploitation status
The record shows that this CVE is not listed in the CISA Known Exploited Vulnerabilities catalog. No confirmed exploitation appears in the sources consulted. The EPSS probability is recorded as 0.00923 with a percentile of 0.59351, which is an estimate of exploitation likelihood and not evidence of exploitation.
Remediation and mitigation
- Apply the vendor patch. The record states that the patch must be applied for full mitigation of the JobServer issue.
- For Talend JobServer, the record indicates that requiring TLS client authentication for the monitoring port mitigates the issue, but this is not described as a substitute for the patch.
- For Talend ESB Runtime, the record indicates that disabling the JobServer JMX monitoring port mitigates the issue. The record states this port is disabled by default from the R2024-07-RT patch onward.
- Restrict network access to JMX monitoring ports so they are not reachable from untrusted networks.
Detection guidance
- Inventory all Talend JobServer and Talend Runtime deployments and identify whether the JMX monitoring port is enabled.
- Review network segmentation and firewall rules to confirm JMX ports are reachable only from authorized management hosts.
- Review logs and monitoring data for unexpected connections to JMX monitoring ports and for unusual activity on hosts running these products.
Limitations of the available information
The record does not include affected version ranges, fixed version numbers, a CWE, or a detailed technical description beyond the summary. The only reference is a Qlik community article, and its content was not verified beyond what the record states. The EPSS date recorded is 2026-10-13, which is later than the publication date and should be verified against the source. The record status is Awaiting Analysis, so the information may change.
Frequently asked questions
What is the core risk of CVE-2026-6264?
The record describes unauthenticated remote code execution through the JMX monitoring port of Talend JobServer and Talend Runtime, with a CNA-assigned CVSS 3.1 score of 9.8.
Is this CVE known to be exploited?
It is not listed in the CISA KEV catalog in the record, and no confirmed exploitation appears in the sources consulted.
Is a temporary mitigation enough?
The record says TLS client authentication on the JobServer monitoring port mitigates the issue, but the patch must be applied for full mitigation.
This analysis was drafted with AI assistance from verified source data and automatically checked against it.