PT-2026-56498

Name of the Vulnerable Software and Affected Versions Immutable.js versions prior to 4.3.9 Immutable.js versions prior to 5.1.8 Description Certain functions mishandle an index or size within the range 2 30 to 2 31 in the setListBounds function located in src/List.js. This can lead to an empty Li...

Security Bulletin: IBM Engineering Lifecycle Management products using WebSphere Application Server Liberty is affected by a prototype pollution vulnerability due to immutable (CVE-2026-29063)

Summary There is a vulnerability in the immutable library which affects IBM WebSphere Application Server Liberty with the openapi-3.0, openapi-3.1, mpOpenAPI-1.0, mpOpenAPI-1.1, mpOpenAPI-2.0, mpOpenAPI-3.0 mpOpenAPI-3.1, mpOpenAPI-4.0 or mpOpenAPI-4.1 feature enabled. Following IBM Engineering...

Security Bulletin: Vulnerability in Immutable.js affects IBM watsonx Assistant Cartridge and IBM watsonx Orchestrate with watsonx Assistant Cartridge.

Summary Potential vulnerability in Immutable.js has been identified that affects IBM watsonx Assistant Cartridge and IBM watsonx Orchestrate with watsonx Assistant Cartridge - Assistant Builder Component. . The vulnerability have been addressed. Refer to details for additional information...

Security Bulletin: Due to use of immutable-4.3.7.tgz, IBM Sterling Connect:Direct Web Services is affected by Improperly Controlled Modification of Object Prototype Attributes.

Summary immutable-4.3.7.tgz is used by IBM Sterling Connect:Direct Web Services CVE-2026-29063. Vulnerability Details CVEID:CVE-2026-29063 DESCRIPTION: Immutable.js provides many Persistent Immutable data structures. Prior to versions 3.8.3, 4.3.7, and 5.1.5, Prototype Pollution is possible in...

Security Bulletin: IBM Maximo Application Suite - Predict Component uses WebSphere Application Server Liberty was affected by a prototype pollution vulnerability due to immutable (CVE-2026-29063)

Summary Security Bulletin: IBM Maximo Application Suite - Predict Component uses WebSphere Application Server Liberty was affected by prototype pollution vulnerability due to immutable CVE-2026-29063. This bulletin contains information regarding the vulnerability and its fixture. Vulnerability...

Security Bulletin: Security vulnerability in JavaScript affects IBM Robotic Process Automation and IBM Robotic Process Automation for Cloud Pak

Summary A security vulnerability in JavaScript affects IBM Robotic Process Automation and IBM Robotic Process Automation for Cloud Pak. JavaScript is used by IBM Robotic Process Automation and IBM Robotic Process Automation for Cloud Pak as part of its deployment. This bulletin identifies the fix...

Security Bulletin: IBM WebSphere Application Server Liberty, which is bundled with IBM Cloud Pak for Applications, is affected by a prototype pollution vulnerability due to immutable (CVE-2026-29063)

Summary IBM WebSphere Application Server Liberty, which is bundled with IBM Cloud Pak for Applications, is affected by a prototype pollution vulnerability in the immutable library with the openapi-3.0, openapi-3.1, mpOpenAPI-1.0, mpOpenAPI-1.1, mpOpenAPI-2.0, mpOpenAPI-3.0 mpOpenAPI-3.1,...

Security Bulletin: IBM WebSphere Application Server Liberty, which is bundled with IBM Enterprise Application Runtimes, is affected by a prototype pollution vulnerability due to immutable (CVE-2026-29063)

Summary IBM WebSphere Application Server Liberty, which is bundled with IBM Enterprise Application Runtimes, is affected by a prototype pollution vulnerability in the immutable library with the openapi-3.0, openapi-3.1, mpOpenAPI-1.0, mpOpenAPI-1.1, mpOpenAPI-2.0, mpOpenAPI-3.0 mpOpenAPI-3.1,...

Security Bulletin: IBM WebSphere Application Server Liberty, which is bundled with IBM WebSphere Hybrid Edition, is affected by a prototype pollution vulnerability due to immutable (CVE-2026-29063)

Summary IBM WebSphere Application Server Liberty, which is bundled with IBM WebSphere Hybrid Edition, is affected by a prototype pollution vulnerability in the immutable library with the openapi-3.0, openapi-3.1, mpOpenAPI-1.0, mpOpenAPI-1.1, mpOpenAPI-2.0, mpOpenAPI-3.0 mpOpenAPI-3.1,...

CVE-2026-29063

Immutable.js provides many Persistent Immutable data structures. Prior to versions 3.8.3, 4.3.7, and 5.1.5, Prototype Pollution is possible in immutable via the mergeDeep, mergeDeepWith, merge, Map.toJS, and Map.toObject APIs. This issue has been patched in versions 3.8.3, 4.3.7, and 5.1.5...

CVE-2026-29063 Immutable.js: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in immutable

Immutable.js provides many Persistent Immutable data structures. Prior to versions 3.8.3, 4.3.7, and 5.1.5, Prototype Pollution is possible in immutable via the mergeDeep, mergeDeepWith, merge, Map.toJS, and Map.toObject APIs. This issue has been patched in versions 3.8.3, 4.3.7, and 5.1.5...