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German security advisories reported multiple vulnerabilities in IBM WebSphere Application Server Liberty, including a flaw that could allow attackers to bypass security measures. The notices identify at least two separate issues affecting the Liberty application server platform, indicating ongoing security concerns for organizations running IBM middleware in production environments.
The advisories describe one case as a security bypass vulnerability and another as multiple vulnerabilities, suggesting that affected deployments may face a range of risks depending on configuration and exposure. Organizations using IBM WebSphere Liberty should review IBM and national CERT guidance, determine affected versions, and prioritize patching or other mitigations to reduce the risk of unauthorized access or compromise.
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dCERT published Advisory 2026-1214 for IBM WebSphere Application Server describing a vulnerability that allows bypassing security measures. This appears to be a separate disclosure from earlier IBM WebSphere Liberty advisories.
dCERT published Advisory 2026-0830 for IBM WebSphere Application Server Liberty covering multiple vulnerabilities.
dCERT published Advisory 2026-0512 for IBM WebSphere Application Server Liberty describing a vulnerability that allows bypassing security measures.
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IBM disclosed multiple vulnerabilities in **WebSphere Application Server** and **WebSphere Application Server Liberty**, including denial-of-service issues tracked as `CVE-2026-9071` and `CVE-2026-9320`, and an HTTP request smuggling flaw, `CVE-2026-8646`, rated up to **CVSS 8.1**. The affected products include WebSphere Application Server **8.5** and **9.0**, along with WebSphere Liberty versions **17.0.0.3 through 26.0.0.6** when certain servlet or websocket features are enabled. IBM said no workarounds or mitigations are available and advised customers to apply interim fixes for **APAR PH71631** and **PH71370** or upgrade to fix packs **26.0.0.7**, **9.0.5.29**, or **8.5.5.30**. A related high-severity issue, `CVE-2026-9072`, affects **IBM i 7.3 through 7.6** in environments using WebSphere Application Server or Liberty with **Intelligent Management** and the **WebSphere WebServer Plug-in**. IBM said an attacker who can impersonate backend servers and send crafted responses to the plug-in could trigger **remote code execution** and **denial of service**, also with a **CVSS 8.1** rating. Recommended actions include installing the latest WebSphere security updates, updating IBM i to current levels, and reviewing the secure configuration of Intelligent Management and the WebSphere WebServer Plug-in.
Jun 29, 2026
IBM disclosed a critical `CVE-2026-8633` vulnerability in WebSphere Application Server and WebSphere Liberty deployments that use the optional **Web Server Plug-ins** component, warning that unauthenticated attackers can send specially crafted HTTP requests to execute arbitrary commands on the host. The flaw, classified as improper control of code generation (`CWE-94`) and rated `CVSS 9.8`, affects WebSphere Application Server traditional and Liberty versions `8.5` and `9.0`, with successful exploitation potentially leading to full system compromise. IBM also patched `CVE-2026-8620`, an HTTP request smuggling issue that could let attackers bypass security controls and manipulate backend communications in affected environments. The company said both issues are addressed through **APAR `PH71342`** and related fix packs, and advised administrators to apply the fixes, validate updates in non-production environments, monitor HTTP traffic, restrict exposure of plug-in endpoints, use WAF protections, and perform threat hunting for signs of exploitation.
Jun 29, 2026
IBM disclosed multiple high-severity vulnerabilities affecting **WebSphere** and **webMethods Integration Server**, exposing enterprise middleware environments to remote compromise. In WebSphere, the reported issues include remote code execution flaws tracked as `CVE-2026-9311`, `CVE-2026-9330`, and `CVE-2026-9319`, alongside an authentication bypass and identity spoofing issue, `CVE-2026-8644`. Affected deployments include traditional WebSphere versions **9.0** and **8.5**, with IBM issuing interim fixes through specific APARs and urging administrators to verify configurations and apply patches quickly. A separate IBM advisory covers **webMethods Integration Server** `CVE-2025-36072`, a deserialization-based remote code execution flaw that can be exploited by an authenticated attacker with service execution privileges through internal APIs or protocols such as `IDataBin`. The vulnerability affects versions **10.11** through `10.11_Core_Fix22`, **10.15** through `10.15_Core_Fix22`, and **11.1** through `11.1_Core_Fix6` if they have not received the latest core fixes. Successful exploitation could allow arbitrary code execution in the Integration Server process, enabling lateral movement, persistence, and data exfiltration across business-critical systems.
Jun 29, 2026