Is CVE-2026-44214 in the CISA KEV catalog?

No. CVE-2026-44214 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-44214?

CVE-2026-44214 has a CVSS v3 base score of 5.8 (MEDIUM).

What is the EPSS score for CVE-2026-44214?

CVE-2026-44214 has an EPSS score of 0.28% (19th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-44214?

Upgrade eventsource-encoder to 1.0.2 or later.

CVE & CISA-KEV Catalog

CVE-2026-44214

MEDIUM

5.8

CVSS v3

NVD

Description

eventsource-encoder encodes events as well-formed EventSource/Server Sent Event (SSE) messages. Prior to 1.0.2, eventsource-encoder does not sanitize the event or id fields of an EventSourceMessage before serializing them. An attacker who controls either field can inject arbitrary Server-Sent Events line terminators (\n, \r, or \r\n) and thereby forge additional SSE fields or entire messages on the stream. This vulnerability is fixed in 1.0.2.

CWE-93 CWE-113

How to fix

Remediation Available

eventsource-encoderNVD

Affected:< 1.0.2Fixed in:1.0.2CVE-2026-44214derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Exploit Intelligence

0.28%probability of exploitation in 30 days

19thpercentile

Low risk: more likely to be exploited than 19% of all known CVEs.

References

Exploit1

github.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-28.