Prototype pollution leading to stored XSS
Prototype pollution vulnerability in searchParamsToObject() is leading to a persistent XSS in Maps. URL parameter processing was not filtering dangerous properties like __proto__, combined with jQuery's unsafe element creation that traversed the prototype chain.
Severity high: primary CNA CVSS 8.5 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.
Published 2026-08-18T12:16:15.322Z. Updated 2026-08-19T03:55:58.598Z.