IBM WebSphere Liberty 17.0.0.3-26.0.0.9 Admin Client MITM
CVE-2026-77816 Published on October 13, 2026
IBM WebSphere Application Server Liberty Improper Certificate Validation
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.9 administrative client could allow man-in-the-middle attacks. An attacker could exploit this vulnerability to obtain sensitive information.
Vulnerability Analysis
CVE-2026-77816 is exploitable 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 high impact on confidentiality, with no impact on integrity, and no impact on availability.
Weakness Type
Improper Certificate Validation
The software does not validate, or incorrectly validates, a certificate. When a certificate is invalid or malicious, it might allow an attacker to spoof a trusted entity by interfering in the communication path between the host and client. The software might connect to a malicious host while believing it is a trusted host, or the software might be deceived into accepting spoofed data that appears to originate from a trusted host.
Products Associated with CVE-2026-77816
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Affected Versions
IBM WebSphere Application Server - Liberty:- Version 17.0.0.3, <= 26.0.0.9 is affected.