CVE-2026-55153Public exploit

Server-side requests via unsafe JavaBean materialization

Published Jul 1, 2026 · Updated Jul 1, 2026

Unsafe reflection in Machinery For Change LLC mchange-commons-java before 0.6.0 allows attackers to trigger server-side HTTP requests. JavaBeanObjectFactory materializes an attacker-selected class from a JNDI Reference and applies attacker-controlled JavaBean properties without an allowlist. An application must look up the malicious Reference or deserialize one through ReferenceIndirector; compatible gadget chains can extend the impact to code execution.

CVSS severity7.1
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe reflection in Machinery For Change LLC mchange-commons-java before 0.6.0 allows attackers to trigger server-side HTTP requests. JavaBeanObjectFactory materializes an attacker-selected class from a JNDI Reference and applies attacker-controlled JavaBean properties without an allowlist. An application must look up the malicious Reference or deserialize one through ReferenceIndirector; compatible gadget chains can extend the impact to code execution.

The record

CVE
CVE-2026-55153
Published
Jul 1, 2026
Updated
Jul 1, 2026
Vendor
Machinery For Change, LLC
Product
mchange-commons-java
Classifications
CWE-470, CWE-502
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 1, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.6.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Machinery For Change, LLC · mchange-commons-javaversion=< 0.6.0

Published CVSS scores

7.1GitHub, Inc.CVSS:3.1/AV:A/AC:H/PR:L/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.

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No observations available

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

Weakness, pattern, technique

CWE-470Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
CWE-502Deserialization of Untrusted Data

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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