CVE-2026-84218: Jolokia service jsr160 Jolokia-service-jsr160 Incomplete Target JMX Service Vulnerability

HIGH
Advisory Identifier: GHSA-c9ff-59g8-m36q
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CVSS 7.5
CWE-184
Published
Advisory Summary

CVE-2026-84218 is a HIGH (CVSS 7.5) jolokia-service-jsr160 incomplete target jmx service vulnerability (CWE-184: Incomplete List of Disallowed Inputs) affecting Jolokia service jsr160 libraries in the Maven ecosystem. The issue involves jolokia-service-jsr160 incomplete target jmx service url deny list handling for user-controlled input. Remediation is available by upgrading affected packages to version 2.6.2.

CVE-2026-84218 at a Glance

CVE Identifier CVE-2026-84218
GHSA Identifier GHSA-c9ff-59g8-m36q
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-184: Incomplete List of Disallowed Inputs
Affected Product Jolokia service jsr160
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-84218

To remediate this vulnerability, upgrade all affected Jolokia service jsr160 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.jolokia:jolokia-service-jsr160 fixed: 2.6.2 
<dependency>
    <groupId>org.jolokia</groupId>
    <artifactId>jolokia-service-jsr160</artifactId>
    <version>2.6.2</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.jolokia

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-84218, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.jolokia

Analyze the terminal output to locate any version of Jolokia service jsr160 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.6.2), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.jolokia command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-184: Incomplete List of Disallowed Inputs, where the product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete. In Jolokia service jsr160, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A flaw was found in Jolokia's JSR-160 proxy functionality where insufficient validation of client-controlled JMX service URLs allows a bypass of the denylist introduced to mitigate CVE-2018-1000130. The proxy accepts a `target.url` value from a Jolokia POST request and passes it to `JMXServiceURL` and `JMXConnectorFactory` for establishing the remote JMX connection. The existing denylist only rejects URLs matching `service:jmx:rmi:///jndi/ldap:.*`, which can be bypassed using alternative valid JMX service URL forms, including `ldaps://` schemes or LDAP URLs with a non-empty JMX host component. These URLs are accepted as valid `JMXServiceURL` objects and can cause the Jolokia agent JVM to perform a JNDI lookup against an attacker-controlled LDAP endpoint. This can result in server-side request forgery (SSRF), forwarding of supplied JMX credentials to the remote endpoint, and potentially remote code execution depending on the classes and configuration available in the target JVM.

CVE-2026-84218 Affected Jolokia service jsr160 Versions

1 component(s)
Fixed Versions:
2.6.2
Product / Package Ecosystem Affected Versions Fixed Version
org.jolokia:jolokia-service-jsr160
maven/org.jolokia/jolokia-service-jsr160
Maven
< 2.6.2
2.6.2

References

NVD — CVE-2026-84218 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84218
Jolokia service jsr160 Source Repository REPOSITORY
https://github.com/jolokia/jolokia/issues/1049
Jolokia service jsr160 Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-84218
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2526752
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-c9ff-59g8-m36q
Jolokia service jsr160 Source Repository REPOSITORY
https://github.com/jolokia/jolokia
jolokia.org/ WEB
https://jolokia.org/#jolokia_2_6_2_released_with_security_fixes

Frequently Asked Questions

What is CVE-2026-84218?
CVE-2026-84218 is a security vulnerability in Jolokia service jsr160 involving jolokia-service-jsr160 Incomplete target JMX Service URL deny list handling for user-controlled input under CWE-184: Incomplete List of Disallowed Inputs.
Which Jolokia service jsr160 versions are affected?
Affected versions include releases prior to 2.6.2 across affected packages: org.jolokia:jolokia-service-jsr160.
What version fixes CVE-2026-84218?
Upgrading to 2.6.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is jolokia-service-jsr160 affected?
Yes, org.jolokia:jolokia-service-jsr160 is affected in releases prior to 2.6.2. Upgrade your dependency to 2.6.2 or later.
What is the CVSS score of CVE-2026-84218?
CVE-2026-84218 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-84218?
CVE-2026-84218 is classified under CWE-184: Incomplete List of Disallowed Inputs (The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete.).
How can I check Maven dependencies for CVE-2026-84218?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.jolokia'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-c9ff-59g8-m36q",
  "modified" : "2026-10-07T18:04:11Z",
  "published" : "2026-09-01T15:31:13Z",
  "aliases" : [ "CVE-2026-84218" ],
  "summary" : "jolokia-service-jsr160 Incomplete target JMX Service URL deny list handling for user-controlled input",
  "details" : "A flaw was found in Jolokia's JSR-160 proxy functionality where insufficient validation of client-controlled JMX service URLs allows a bypass of the denylist introduced to mitigate CVE-2018-1000130. The proxy accepts a `target.url` value from a Jolokia POST request and passes it to `JMXServiceURL` and `JMXConnectorFactory` for establishing the remote JMX connection. The existing denylist only rejects URLs matching `service:jmx:rmi:///jndi/ldap:.*`, which can be bypassed using alternative valid JMX service URL forms, including `ldaps://` schemes or LDAP URLs with a non-empty JMX host component. These URLs are accepted as valid `JMXServiceURL` objects and can cause the Jolokia agent JVM to perform a JNDI lookup against an attacker-controlled LDAP endpoint. This can result in server-side request forgery (SSRF), forwarding of supplied JMX credentials to the remote endpoint, and potentially remote code execution depending on the classes and configuration available in the target JVM.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
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      "ecosystem" : "Maven",
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    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.6.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
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  }, {
    "type" : "ADVISORY",
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  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jolokia/jolokia"
  }, {
    "type" : "WEB",
    "url" : "https://jolokia.org/#jolokia_2_6_2_released_with_security_fixes"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-184" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-07T18:04:11Z",
    "nvd_published_at" : "2026-09-01T14:17:49Z"
  }
}