CVE-2026-33128

HIGH

7.5

Descricao

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.

Detalhes CVE

Pontuacao CVSS v3.17.5

SeveridadeHIGH

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

Vetor de ataqueNETWORK

ComplexidadeHIGH

Privilegios necessariosNONE

Interacao do usuarioNONE

Publicado3/20/2026

Ultima modificacao3/20/2026

Fontenvd

Avistamentos honeypot0

Produtos afetados

h3:h3

Fraquezas (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)

Correlacoes IOC

Sem correlacoes registradas

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