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.
Published: 2026-05-12
Score: 6.6 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-84hm-wfh8-c5pg sse-channel: SSE Injection via unsanitized event fields
History

Thu, 14 May 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 13 May 2026 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Rexxars
Rexxars sse-channel
Vendors & Products Rexxars
Rexxars sse-channel

Tue, 12 May 2026 20:15:00 +0000

Type Values Removed Values Added
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.
Title sse-channel: SSE Injection via unsanitized event fields
Weaknesses CWE-93
References
Metrics cvssV4_0

{'score': 6.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U'}


Subscriptions

Rexxars Sse-channel
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-14T19:52:02.383Z

Reserved: 2026-05-05T15:13:47.572Z

Link: CVE-2026-44217

cve-icon Vulnrichment

Updated: 2026-05-14T19:51:38.030Z

cve-icon NVD

Status : Deferred

Published: 2026-05-12T20:16:42.513

Modified: 2026-05-13T18:21:10.270

Link: CVE-2026-44217

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-13T10:36:13Z

Weaknesses