CVE-2026-86252

h3 versions before 1.15.9 fail to sanitize carriage return characters in EventStream data and comment fields, enabling attackers to inject arbitrary SSE events . The flaw allows injection of event type directives, splitting a single push call into multiple browser-parsed events, or escaping comme...

CVE-2026-86252 h3 before 1.15.9 SSE Event Injection via Carriage Return

h3 versions before 1.15.9 fail to sanitize carriage return characters in EventStream data and comment fields, allowing attackers to inject arbitrary SSE events by including unsanitized carriage returns. Attackers can inject event type directives, split single push calls into multiple browser-pars...

CVE-2026-86252 h3 before 1.15.9 SSE Event Injection via Carriage Return

h3 versions before 1.15.9 fail to sanitize carriage return characters in EventStream data and comment fields, allowing attackers to inject arbitrary SSE events by including unsanitized carriage returns. Attackers can inject event type directives, split single push calls into multiple browser-pars...

CVE-2026-35515: Improper Neutralization of Special Elements in Output Used by a Downstream Component

Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.18, SseStream.transform interpolates message.type and message.id directly into Server-Sent Events text protocol output without sanitizing newline characters \r, \n. Since the SSE protocol treats both \r and ...