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CVE-2026-44214

eventsource-encoder: SSE event injection via unsanitized event and id fields PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
rexxars / eventsource-encoderaffected < 1.0.2

CWE

CWE-93, CWE-113

References

ADP enrichment

CISA-ADP

No English description supplied.