CVE-2026-16441Network attack vector

Program integrity compromise via incorrect invokeinterface dispatch

Published Jul 21, 2026 · Updated Jul 21, 2026

Incorrect method resolution in Eclipse OpenJ9 0.8.0 through 0.59.0 allows attackers to alter program behavior via crafted class files. The invokeinterface error path assumes a found abstract method belongs to an interface and performs default-method resolution instead of raising IllegalAccessError. Triggering requires a crafted class hierarchy and active user execution; the resulting wrong target can modify application state and interrupt service.

CVSS severity6.9
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect method resolution in Eclipse OpenJ9 0.8.0 through 0.59.0 allows attackers to alter program behavior via crafted class files. The invokeinterface error path assumes a found abstract method belongs to an interface and performs default-method resolution instead of raising IllegalAccessError. Triggering requires a crafted class hierarchy and active user execution; the resulting wrong target can modify application state and interrupt service.

The record

CVE
CVE-2026-16441
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
The Eclipse Foundation
Product
Eclipse OpenJ9
Classifications
CWE-758, T1204.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 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=0.8.0 <0.60.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Eclipse Foundation · Eclipse OpenJ9version=0.8.0 <0.60.0

Published CVSS scores

3.7OracleCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
6.9SUSECVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:N/VI:H/VA:L/SC:L/SI:H/SA:N
6.9Eclipse FoundationCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:N/VI:H/VA:L/SC:L/SI:H/SA:N
7.1SUSECVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-758Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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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