Handlebars.js has Prototype Pollution Leading to XSS through Partial Template Injection

Summary resolvePartial in the Handlebars runtime resolves partial names via a plain property lookup on options.partials without guarding against prototype-chain traversal. When Object.prototype has been polluted with a string value whose key matches a partial reference in a template, the polluted...

GHSA-2QVQ-RJWJ-GVW9 Handlebars.js has Prototype Pollution Leading to XSS through Partial Template Injection

Summary resolvePartial in the Handlebars runtime resolves partial names via a plain property lookup on options.partials without guarding against prototype-chain traversal. When Object.prototype has been polluted with a string value whose key matches a partial reference in a template, the polluted...