Log Injection in IBM WebSphere App Server 8.5/9.0 Admin Log
CVE-2026-16189 Published on September 14, 2026

IBM WebSphere Application Server prior to 9.0.5.29 and 8.5.5.31 are affected by multiple vulnerabilities
IBM WebSphere Application Server 9.0, and 8.5 could allow a remote attacker to inject forged log entries into the server's administrative log.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-16189 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
LOW
Integrity Impact:
LOW
Availability Impact:
NONE

Weakness Type

Improper Output Neutralization for Logs

The software does not neutralize or incorrectly neutralizes output that is written to logs.


Products Associated with CVE-2026-16189

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IBM WebSphere Application Server
 

Affected Versions

IBM WebSphere Application Server:

Exploit Probability

EPSS
0.22%
Percentile
10.80%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.