CVE-2026-33128

HIGH

7.5

Descripcion

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.

Detalles CVE

Puntuacion CVSS v3.17.5

SeveridadHIGH

Vector CVSSCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N

Vector de ataqueNETWORK

ComplejidadHIGH

Privilegios requeridosNONE

Interaccion usuarioNONE

Publicado3/20/2026

Ultima modificacion3/20/2026

Fuentenvd

Avistamientos honeypot0

Productos afectados

h3:h3

Debilidades (CWE)

CWE-93

Referencias

https://github.com/h3js/h3/blob/52c82e18bb643d124b8b9ec3b1f62b081f044611/src/utils/internal/event-stream.ts#L170-L187(security-advisories@github.com)

https://github.com/h3js/h3/commit/7791538e15ca22437307c06b78fa155bb73632a6(security-advisories@github.com)

https://github.com/h3js/h3/security/advisories/GHSA-22cc-p3c6-wpvm(security-advisories@github.com)

Correlaciones IOC

Sin correlaciones registradas

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