CVE-2026-33128

HIGH

7.5

Beschreibung

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.

CVE Details

CVSS v3.1 Bewertung7.5

SchweregradHIGH

CVSS VektorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N

AngriffsvektorNETWORK

KomplexitatHIGH

Erforderliche PrivilegienNONE

BenutzerinteraktionNONE

Veroffentlicht3/20/2026

Zuletzt geandert3/20/2026

Quellenvd

Honeypot-Sichtungen0

Betroffene Produkte

h3:h3

Schwachen (CWE)

CWE-93

Referenzen

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)

IOC Korrelationen

Keine Korrelationen erfasst

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