CVE-2026-6918 Vulnerability Analysis & Exploit Details

CVE-2026-6918
Vulnerability Scoring

7.5
/10
Very High Risk

Highly exploitable, CVE-2026-6918 poses a critical security risk that could lead to severe breaches.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2026-6918 Details

Status: Analyzed

Published on: 05 May 2026, 13:16 UTC

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2026-6918 Vulnerability Summary

CVE-2026-6918: In Eclipse Open9J versions 0.21 to 0.58, a pre-authentication remote attacker can crash JITServer by sending a 32-byte crafted TCP message.

Assessing the Risk of CVE-2026-6918

Access Complexity Graph

The exploitability of CVE-2026-6918 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-6918

With low attack complexity and no required privileges, CVE-2026-6918 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-6918, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2026-6918, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2026-6918 has no significant impact on data confidentiality.
  • Integrity: None
    CVE-2026-6918 poses no threat to data integrity.
  • Availability: High
    CVE-2026-6918 can disrupt system operations, potentially causing complete denial of service (DoS).

CVE-2026-6918 References

External References

CWE Common Weakness Enumeration

CWE-125

CAPEC Common Attack Pattern Enumeration and Classification

  • Overread Buffers CAPEC-540 An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.

Vulnerable Configurations

  • cpe:2.3:a:eclipse:openj9:0.21.0:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.21.0:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.21.0:milestone1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.21.0:milestone1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.21.0:milestone2:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.21.0:milestone2:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.22.0:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.22.0:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.22.0:milestone1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.22.0:milestone1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.22.0:milestone2:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.22.0:milestone2:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.23.0:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.23.0:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.23.0:milestone1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.23.0:milestone1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.23.0:milestone2:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.23.0:milestone2:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.24.0:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.24.0:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.24.0:milestone1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.24.0:milestone1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.24.0:milestone2:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.24.0:milestone2:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.25.0:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.25.0:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.25.0:milestone1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.25.0:milestone1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.25.0:milestone2:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.25.0:milestone2:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.25.0:milestone3:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.25.0:milestone3:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.26.0:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.26.0:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.26.0:milestone1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.26.0:milestone1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.26.0:milestone2:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.26.0:milestone2:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.27.0:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.27.0:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.27.0:milestone1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.27.0:milestone1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.27.0:milestone2:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.27.0:milestone2:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.27.1:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.27.1:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.28.0:milestone1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.28.0:milestone1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.28.0:milestone2:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.28.0:milestone2:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.29.0:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.29.0:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.29.0:milestone1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.29.0:milestone1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.29.0:milestone2:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.29.0:milestone2:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.29.0:milestone2a:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.29.0:milestone2a:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.29.1:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.29.1:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.29.1:m1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.29.1:m1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.30.0:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.30.0:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.30.0:m1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.30.0:m1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.30.0:m1a:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.30.0:m1a:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.30.0:m2:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.30.0:m2:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.30.0:m3:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.30.0:m3:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.30.0:m3a:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.30.0:m3a:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.30.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.30.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.30.1:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.30.1:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.31.0:m1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.31.0:m1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.31.0:m2:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.31.0:m2:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.31.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.31.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.31.0:rc1a:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.31.0:rc1a:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.32.0:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.32.0:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.32.0:m1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.32.0:m1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.32.0:m1a:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.32.0:m1a:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.32.0:m2:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.32.0:m2:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.32.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.32.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.33.0:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.33.0:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.33.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.33.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.33.0:rc1a:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.33.0:rc1a:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.33.0:milestone1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.33.0:milestone1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.33.0:milestone2:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.33.0:milestone2:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.33.0:milestone2a:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.33.0:milestone2a:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.33.1:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.33.1:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.33.1:rc1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.33.1:rc1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.35.0:-:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.35.0:-:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.35.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.35.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.35.0:milestone1:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.35.0:milestone1:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.35.0:milestone2:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.35.0:milestone2:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.35.0:milestone2a:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.35.0:milestone2a:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.35.0:milestone2b:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.35.0:milestone2b:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.36.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.36.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.36.1:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.36.1:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.37.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.37.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.38.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.38.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.39.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.39.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.40.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.40.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.41.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.41.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.42.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.42.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.43.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.43.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.44.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.44.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.45.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.45.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.46.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.46.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.46.1:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.46.1:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.47.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.47.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.48.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.48.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.49.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.49.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.51.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.51.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.53.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.53.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.54.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.54.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.55.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.55.0:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:openj9:0.56.0:*:*:*:*:*:*:*
    cpe:2.3:a:eclipse:openj9:0.56.0:*:*:*:*:*:*:*

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