CVE-2026-44217
Medium
Description
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.
SeverityMedium
CVSS6.6
Exploit probability—
ProductSse-channel
PublishedMay 12, 2026
First seenMay 12, 2026
Weakness typeCWE-93CWE-93
How to fix
Update
- sse-channel4.0.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| sse-channelnpm | v < 4.0.1 | 4.0.1 |
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