Security Advisory

CVE-2026-44214

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-05-26 19:34:32

Last updated 2026-05-27 13:19:45

Assigner GitHub_M

CVSS score 5.8

State PUBLISHED

Description

eventsource-encoder encodes events as well-formed EventSource/Server Sent Event (SSE) messages. Prior to 1.0.2, eventsource-encoder does not sanitize the event or id fields of an EventSourceMessage before serializing them. An attacker who controls either field can inject arbitrary Server-Sent Events line terminators (\n, \r, or \r\n) and thereby forge additional SSE fields or entire messages on the stream. This vulnerability is fixed in 1.0.2.

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