CVE-2026-33128
CVE-2026-33128 · h3 has a Server-Sent Events Injection via Unsanitized Newlines in Event Stream Fields
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H3 is a minimal H(TTP) framework. In versions prior to 1.15.6 and between 2.0.0 through 2.0.1-rc.14, createEventStream is vulnerable to Server-Sent Events (SSE) injection due to missing newline sanitization in formatEventStreamMessage() and formatEventStreamComment(). An attacker who controls any part of an SSE message field (id, event, data, or comment) can inject arbitrary SSE events to connected clients. This issue is fixed in versions 1.15.6 and 2.0.1-rc.15.
CVSS 7.5 · Hoch · EPSS 0,6% · Korrektur verfügbar
- Veröffentlicht
- Aktualisiert
Technologie-Stack: node
Betroffene Produkte und Versionen
Originalquellen
- https://github.com/h3js/h3/security/advisories/GHSA-22cc-p3c6-wpvm
- https://github.com/h3js/h3/commit/7791538e15ca22437307c06b78fa155bb73632a6
- https://github.com/h3js/h3/blob/52c82e18bb643d124b8b9ec3b1f62b081f044611/src/utils/internal/event-stream.ts#L170-L187
- https://nvd.nist.gov/vuln/detail/CVE-2026-33128