CVE-2026-44217
Published:May 12, 2026
Updated:May 16, 2026
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.
Affected Packages
https://github.com/rexxars/sse-channel.git (GITHUB):
Affected version(s) >=v2.0.1 <v4.0.1Fix Suggestion:
Update to version v4.0.1sse-channel (NPM):
Affected version(s) >=1.0.0 <4.0.1Fix Suggestion:
Update to version 4.0.1sse-channel (NPM):
Affected version(s) >=1.0.0 <4.0.1Fix Suggestion:
Update to version 4.0.1Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.6
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
Exploit Maturity
UNREPORTED
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of CRLF Sequences ('CRLF Injection')
EPSS
Base Score:
0.05