Security Bulletin: IBM Documentation Offline is vulnerable to `Denial of Service via __proto__ header name in req.headersDistinct` due to Node.js (CVE-2026-21710)

Summary IBM Documentation Offline utilizes Node.js as a third-party component, which contains a vulnerability that could potentially affect your product's stability and security. CVE-2026-21710 CVSS: 3.1 is a denial-of-service DoS vulnerability identified in the Node.js core HTTP module. An...

CVE-2026-21710: Allocation of Resources Without Limits or Throttling

A flaw in Node.js HTTP request handling causes an uncaught TypeError when a request is received with a header named proto and the application accesses req.headersDistinct. When this occurs, dest"proto" resolves to Object.prototype rather than undefined, causing .push to be called on a non-array...