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VulnerabilityAwaiting classification

CVE-2026-6264

CRITICAL · 9.8 CVSS v3.1 Published 2026-04-14
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A critical vulnerability in the Talend JobServer and Talend Runtime allows unauthenticated remote code execution via the JMX monitoring port. The attack vector is the JMX monitoring port of the Talend JobServer. The vulnerability can be mitigated for the Talend JobServer by requiring TLS client authentication for the monitoring port; however, the patch must be applied for full mitigation. For Talend ESB Runtime, the vulnerability can be mitigated by disabling the JobServer JMX monitoring port, which is disabled by default from the R2024-07-RT patch.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

A critical unauthenticated remote code execution vulnerability in Talend JobServer and Talend Runtime allows attackers to execute arbitrary code via the exposed JMX monitoring port without any authentication. The JMX (Java Management Extensions) monitoring interface lacks proper access controls, enabling attackers to inject and execute malicious code on affected systems.

MitigationFor Talend JobServer, require TLS client authentication on the JMX monitoring port and apply the vendor patch. For Talend ESB Runtime, disable the JobServer JMX monitoring port (or upgrade to R2024-07-RT or later where it is disabled by default).

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify running Talend JobServer processes
    Use process enumeration commands (e.g., tasklist on Windows, ps on Linux) to find Java processes related to Talend (look for 'Talend', 'JobServer', or 'Runtime' in process names or command-line arguments).
    Affected if Talend JobServer or Runtime processes are running and exposed to network.
  2. Locate JMX monitoring port configuration
    Examine Talend configuration files (typically in the Talend installation directory under conf/ or etc/) and check for JMX port settings (commonly ports 1099, 1100, or custom JMX ports defined in properties files). Review startup scripts for -Dcom.sun.management.jmxremote parameters.
    Affected if JMX monitoring port is explicitly configured and bound to a network interface accessible to attackers.
  3. Verify JMX authentication is enforced
    Inspect JMX configuration files for authentication settings: check for properties like 'com.sun.management.jmxremote.authenticate=true', review access and password files in the conf/jmx directory, and verify client authentication is required.
    Affected if JMX authentication is disabled (authenticate=false) or no password file is configured, allowing unauthenticated access.
  4. Check Talend Runtime version
    Locate the Talend Runtime version by examining version.info, product.version, or similar files in the installation directory, or by querying the karaf/runtime shell if accessible.
    Affected if Runtime version is earlier than R2024-07-RT where JMX monitoring is not disabled by default.
  5. Confirm JMX port exposure to network
    Use netstat or ss commands to check if JMX ports (from step 2) are listening on 0.0.0.0 or non-loopback interfaces rather than only on localhost/127.0.0.1.
    Affected if JMX port is bound to 0.0.0.0 or an external IP, making it accessible from the network.

Your environment is affected if Talend JobServer or Runtime with an exposed JMX monitoring port is running without TLS client authentication, especially on versions prior to R2024-07-RT.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

For Talend JobServer, require TLS client authentication on the JMX monitoring port and apply the vendor patch. For Talend ESB Runtime, disable the JobServer JMX monitoring port (or upgrade to R2024-07-RT or later where it is disabled by default).

Recommended fix Moderate confidence

R2024-07-RT patch or later

  1. Upgrade Talend JobServer and Talend Runtime to the R2024-07-RT patch or later release
  2. For Talend JobServer: Ensure TLS client authentication is required for the JMX monitoring port as an additional security layer
  3. For Talend ESB Runtime: Verify that the JobServer JMX monitoring port remains disabled (it is disabled by default in R2024-07-RT and later)
  4. After upgrade, verify the configuration by reviewing JMX monitoring port settings in the Talend administration console

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing12.0 h
  • Review / QA6.0 h
42.0 hours of engineering $7,360
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-6264 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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