Critical RCE in Talend JobServer & Runtime (CVE-2026-6264)
A critical remote code execution (RCE) vulnerability, tracked as CVE-2026-6264, has been identified in both Talend JobServer and Talend Runtime. According to the National Vulnerability Database, this flaw carries a CVSS score of 9.8, making it a severe concern for organizations leveraging these platforms.
The attack vector for this vulnerability is the JMX monitoring port of the Talend JobServer. Attackers can exploit this without authentication, gaining unauthenticated RCE capabilities. For Talend JobServer, mitigation requires enabling TLS client authentication for the monitoring port, alongside applying the necessary patch. Talend ESB Runtime users have a slightly different path: disabling the JobServer JMX monitoring port, which the National Vulnerability Database notes is actually disabled by default from the R2024-07-RT patch onwards. This is a crucial distinction, as it implies older versions might have it exposed.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 5 SIEM formats3 auto-generated detection rules for this incident, mapped to MITRE ATT&CK. Available in Sigma, Splunk SPL, Sentinel KQL, Elastic Lucene, and QRadar AQL.
Web Application Exploitation Attempt — CVE-2026-6264
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Get Detection Rules →Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-6264 | RCE | Talend JobServer JMX monitoring port |
| CVE-2026-6264 | RCE | Talend Runtime JMX monitoring port |
| CVE-2026-6264 | Misconfiguration | Talend JobServer: JMX monitoring port without TLS client authentication |
| CVE-2026-6264 | Misconfiguration | Talend ESB Runtime: JobServer JMX monitoring port enabled (prior to R2024-07-RT patch) |
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