Lack of data validation In sse-channel
Description
sse-channel: SSE Injection via unsanitized event fields
Impact
Implementations that allows user-provided values to be passed to event, retry or id fields would be susceptible to event spoofing, where an attacker could inject arbitrary messages into the stream.
Event Spoofing: Attacker can inject arbitrary SSE events into the stream
Client-side Manipulation: Injected events can trigger unintended behavior in frontend JavaScript EventSource listeners
Data Integrity: Consumers of the SSE stream cannot distinguish injected events from legitimate ones
Patches
Patch available in v4.0.1.
Workarounds
Do not allow user data to control event, retry or id fields, and if you must - sanitize the input before passing it to sse-channel, stripping any newlines.
Resources
Mitigation
Update Impact
Minimal update. May introduce new vulnerabilities or breaking changes.
Ecosystem | Package | Affected version | Patched versions |
|---|---|---|---|
 npm | sse-channel | 4.0.1 |
Aliases
References