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CVE-2026-5516— IBM WebSphere Application Server Liberty is affected by a security bypass vulnerability

Quick assessment

Affected
IBM WebSphere Application Server - Liberty
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

IBM WebSphere Application Server Liberty是美国国际商业机器（IBM）公司的一款构建于Open Liberty项目之上的Java应用程序服务器。 IBM WebSphere Application Server Liberty 22.0.0.11版本至26.0.0.5版本存在安全漏洞，该漏洞源于特定时间窗口问题，可能导致远程攻击者在有限条件下绕过安全限制。

CVSS 4.4 · Medium EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
IBM WebSphere Application Server - Liberty 22.0.0.11≤ 26.0.0.5 affected
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I. Basic Information for CVE-2026-5516

Vulnerability Information
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Vulnerability Title
IBM WebSphere Application Server Liberty is affected by a security bypass vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
IBM WebSphere Application Server - Liberty 22.0.0.11 through 26.0.0.5 IBM WebSphere Application Server Liberty could allow a remote attacker to bypass security under limited conditions by exploiting a specific timing window.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
IBM WebSphere Application Server Liberty 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM WebSphere Application Server Liberty是美国国际商业机器（IBM）公司的一款构建于Open Liberty项目之上的Java应用程序服务器。 IBM WebSphere Application Server Liberty 22.0.0.11版本至26.0.0.5版本存在安全漏洞，该漏洞源于特定时间窗口问题，可能导致远程攻击者在有限条件下绕过安全限制。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
IBM WebSphere Application Server - Liberty 22.0.0.11 ~ 26.0.0.5 cpe:2.3:a:ibm:websphere_application_server___liberty:22.0.0.11:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-5516

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III. Intelligence Information for CVE-2026-5516

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Vendor Advisories for CVE-2026-5516 (1)

Same Patch Batch · IBM · 2026-05-27 · 29 CVEs total

CVE-2026-8175 9.8 CRITICAL Multiple vulnerabilities in Aspera applications.
CVE-2026-7524 9.8 CRITICAL Path Traversal Vulnerability in File Processing Components Allows Unauthorized File System
CVE-2026-8179 8.8 HIGH Multiple vulnerabilities in Aspera applications.
CVE-2026-5065 8.8 HIGH IBM Controller is affected by vulnerabilities
CVE-2026-7365 8.4 HIGH IBM Operations Analytics - Log Analysis is affected by Information disclosure due to defau
CVE-2026-3623 7.8 HIGH Vulnerabilities exists in IBM Netezza Performance Server Replication Services
CVE-2026-3366 7.5 HIGH InfoSphere Optim Test Data Fabrication is affected by Arbitrary File Read
CVE-2026-8180 7.5 HIGH Multiple vulnerabilities in Aspera applications.
CVE-2024-56462 7.2 HIGH IBM QRadar SIEM is vulnerable to using components with known vulnerabilities
CVE-2026-1718 7.1 HIGH IBM® Db2® is vulnerable to a denial of service with a specially crafted query when running
CVE-2026-7528 7.1 HIGH Unauthenticated File Upload Vulnerability Allows Disk Space Exhaustion and Path Disclosure
CVE-2026-6936 6.5 MEDIUM IBM i is Affected by a Denial of Service Vulnerability []
CVE-2026-6938 6.5 MEDIUM IBM® Db2® is vulnerable to authorization bypass when uploading to a remote object storage
CVE-2026-6052 6.5 MEDIUM IBM® Db2® is vulnerable to running out of memory when executing certain queries with MDC t
CVE-2026-3676 6.5 MEDIUM There are multiple vulnerabilities in IBM DB2 bundled with IBM Application Performance Man
CVE-2026-8405 6.5 MEDIUM IBM Guardium Data Protection is affected by Exposure of Sensitive Information vulnerabilit
CVE-2026-9035 6.5 MEDIUM Multiple vulnerabilities in Aspera applications.
CVE-2024-40684 5.9 MEDIUM IBM Operations Analytics - Log Analysis is affected by Weak Password Policy and Inadequate
CVE-2026-6053 5.5 MEDIUM IBM® Db2® is vulnerable to a denial of service when a specially crafted query is run with
CVE-2026-6051 5.5 MEDIUM IBM® Db2® is vulnerable to a denial of service when executing a specially crafted query wi

Showing top 20 of 29 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: WebSphere Application Server - Liberty
Same vendor: IBM

V. Comments for CVE-2026-5516

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