CVE-2026-44217
📛 CVE Title
sse-channel: SSE Injection via unsanitized event fields
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.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- GitHub_M
- CVSS severity
- MEDIUM
- CVSS score
- 6.6 / 10
- CVSS 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- Effective score
- 6.6 / 10 MEDIUM source: CNA overview
- CWE(s)
-
CWE-93 - Reserved
- 2026-05-05
- Published
- 2026-05-12 21:51 UTC
- Last updated
- 2026-05-14 21:52 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/44xxx/CVE-2026-44217.json
- Linked Threat
- CVE-2026-44217 — CVE-2026-44217
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-12 20:16:42 UTC
- NVD last modified
- 2026-05-13 18:21:10 UTC
- EPSS score
- 0.0002 (probability of exploitation in next 30 days)
- EPSS percentile
- 5.79% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 08:42 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-29794 - Assigner
- GitHub_M
- Published
- May 12, 2026, 7:51:06 PM
- Updated
- May 14, 2026, 7:52:02 PM
- EUVD base score (CVSS 4.0)
-
6.6 / 10
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 - EUVD-reported EPSS
- 0.0200
- Vendors
- rexxars
- Products
-
sse-channel (< 4.0.1)
- Aliases
-
GHSA-84hm-wfh8-c5pg
ENISA 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.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| rexxars | sse-channel |
< 4.0.1 (affected)
|
— |
Vendor references (2)
References embedded in the original CVE record by the assigning CNA.
- https://github.com/rexxars/sse-channel/security/advisories/GHSA-84hm-wfh8-c5pg x_refsource_CONFIRM
- https://github.com/rexxars/sse-channel/issues/42 x_refsource_MISC
MITRE references (2) cveawg.mitre.org
Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.
- https://github.com/rexxars/sse-channel/issues/42 x_refsource_MISC
- https://github.com/rexxars/sse-channel/security/advisories/GHSA-84hm-wfh8-c5pg x_refsource_CONFIRM
Web references (3)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://nvd.nist.gov/vuln/detail/CVE-2026-44217 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-44217 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
NVD-tagged references (2)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://github.com/rexxars/sse-channel/issues/42 security-advisories@github.com
- https://github.com/rexxars/sse-channel/security/advisories/GHSA-84hm-wfh8-c5pg security-advisories@github.com
Remediations (18)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:blogs.oracle.com
For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.
2026-05-23 20:56 UTC -
web:blogs.oracle.com
As a follow-up to our recent post, Accelerating Vulnerability Detection and Response, Oracle is announcing the start date and cadence for monthly Critical Security Patch Updates (CSPUs). Beginning May 28, 2026 , Oracle will deliver a Critical Security Patch Update (CSPU) each month. CSPUs provide targeted fixes for critical vulnerabilities in a smaller, more focused format, allowing customers ...
2026-05-23 20:56 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-23 20:56 UTC -
web:support.microsoft.com
Summary Improvements and fixes included in this update How to obtain and install the update More information File information Information about protection and security Summary This security update contains fixes and resolves vulnerabilities. To learn more about the vulnerabilities, see the following security advisories: CVE - 2026 -40370 - SQL Server Remote Code Execution Vulnerability The ...
2026-05-23 20:56 UTC -
web:support.servicenow.com
Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...
2026-05-23 20:56 UTC -
web:www.absolute.com
March 2026 Patch Tuesday highlights four critical attack paths shaping real‑world breaches. Learn which vulnerabilities CISOs should prioritize now.
2026-05-23 20:56 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.
2026-05-23 20:56 UTC -
web:www.crowdstrike.com
Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.
2026-05-23 20:56 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-23 20:56 UTC -
web:www.pcworld.com
This month's Patch Tuesday includes an actively exploited Office zero-day vulnerability and several critical RCE bugs in Windows and Remote Desktop.
2026-05-23 20:56 UTC -
web:blog.qualys.com
Oracle released its second quarterly edition of this year's Critical Patch Update. The update received patches for 481 security vulnerabilities.
2026-05-26 02:53 UTC -
web:integsec.com
CVE‑2026‑44277 is a critical‑severity vulnerability in Fortinet's FortiAuthenticator identity‑and‑access‑management platform that allows an unauthenticated attacker to execute arbitrary code or commands on the appliance. This single vulnerability can put your corporate identity store, authentication flows, and downstream business systems into an attacker's hands, making it a ...
2026-05-26 02:53 UTC -
web:layerlogix.com
April 2026 Patch Tuesday drops today. Here's what's critical, what to patch first, and how Houston IT teams should handle deployment — including the Secure Boot certificate deadline reminder.
2026-05-26 02:53 UTC -
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-05-26 02:53 UTC -
web:www.bleepingcomputer.com
On Monday, CISA added CVE - 2026 -35616 to its Known Exploited Vulnerabilities (KEV) Catalog and ordered Federal Civilian Executive Branch (FCEB) agencies to patch FortiClient EMS instances by ...
2026-05-26 02:53 UTC -
web:www.securityweek.com
Oracle on Tuesday announced the release of 481 new security patches as part of its April 2026 Critical Patch Update (CPU). Across the 28 product families that received security updates, more than 300 patches address vulnerabilities that are remotely exploitable without authentication.
2026-05-26 02:53 UTC -
web:www.tenable.com
Oracle addresses 241 CVEs in its April Critical Patch Update, the second quarterly update of 2026 with 481 patches, including 34 critical updates.
2026-05-26 02:53 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-26 02:53 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-44217.json.
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