CVE Catalog

CVE-2026-44217

MediumCVSS 6.6
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.48%

41th percentile - higher than 41% of all known CVEs

Summary

sse-channel is an SSE implementation for Node.js HTTP request/response streams. Prior to 4.0.1, implementations that allow user-provided values to be passed to event, retry or id fields are susceptible to event spoofing, where an attacker could inject arbitrary messages into the stream.

Risk Assessment

An attacker can inject fake messages into the SSE stream, potentially deceiving clients and compromising data integrity.

Recommendation

Update sse-channel to version 4.0.1 or later and validate values passed to event, retry and id fields.

Related vulnerabilities

Original NVD description (English source)

sse-channel is an SSE-implementation which can be used to any node.js http request/response stream. Prior to 4.0.1, implementations that allow user-provided values to be passed to event, retry or id fields are susceptible to event spoofing, where an attacker could inject arbitrary messages into the stream. This vulnerability is fixed in 4.0.1.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS