What is CVE-2026-44214?

CVE-2026-44214 is a medium-severity vulnerability in Rexxars Eventsource-encoder, classified under CRLF Injection. CVSS score: 5.8/10. Published 2026-05-26.

How severe is CVE-2026-44214?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Vulnerability in Rexxars Eventsource-encoder

CVE-2026-44214

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…

Vulnerability class: CRLF Injection

EPSS: 0.000 (3.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.

Affected products

Rexxars Eventsource-encoder — versions < 1.0.2

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-44214?: CVE-2026-44214 is a medium-severity vulnerability in Rexxars Eventsource-encoder, classified under CRLF Injection. CVSS score: 5.8/10. Published 2026-05-26.
How severe is CVE-2026-44214?: Medium severity. CVSS v3 base score is 5.8 out of 10.