CVE-2026-84218Public exploitNetwork attack vectorHinoki check available

SSRF via incomplete JMX URL denylist

Published Sep 1, 2026 · Updated Sep 2, 2026

Server-side request forgery in Red Hat AMQ Broker allows attackers to trigger outbound JNDI connections via crafted Jolokia proxy requests. The JSR-160 handler applies one full-string denylist expression to target.url, allowing valid LDAPS URLs and LDAP URLs with nonempty JMX hosts to reach JMXConnectorFactory. Access to the proxy endpoint is required and often authenticated; successful requests can reach internal services, forward supplied JMX credentials, or execute code when suitable JVM classes are present.

CVSS severity8.1
High
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Server-side request forgery in Red Hat AMQ Broker allows attackers to trigger outbound JNDI connections via crafted Jolokia proxy requests. The JSR-160 handler applies one full-string denylist expression to target.url, allowing valid LDAPS URLs and LDAP URLs with nonempty JMX hosts to reach JMXConnectorFactory. Access to the proxy endpoint is required and often authenticated; successful requests can reach internal services, forward supplied JMX credentials, or execute code when suitable JVM classes are present.

The record

CVE
CVE-2026-84218
Published
Sep 1, 2026
Updated
Sep 2, 2026
Vendor
389 Directory Server
Product
Red Hat AMQ Broker
Classifications
CWE-184, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

389 Directory Server · Red Hat AMQ BrokerAffected versions are unavailable in this record.

Published CVSS scores

8.1Red HatCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-184Incomplete List of Disallowed Inputs
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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