eventsource-encoder vulnerabilities and fixes

Recent CVEs affecting eventsource-encoder, with upgrade or downgrade steps. 1 tracked.

Also searched as: eventsource encoder.

eventsource-encoder has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-05-26. Highest priority: CVE-2026-44214 (score 35/100).

• CVE-2026-44214 MEDIUM 5.8 UPGRADE eventsource-encoder encodes events as well-formed EventSource/Server Sent Event (SSE) messages

FAQ

How do I fix eventsource-encoder vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is eventsource-encoder being exploited right now?

None of the tracked eventsource-encoder CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which eventsource-encoder CVE should I patch first?

CVE-2026-44214 currently ranks highest (35/100): eventsource-encoder encodes events as well-formed EventSource/Server Sent Event (SSE) messages.

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