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Vulnerability DatabaseCVE-2026-33128

CVE-2026-33128: 
JavaScript vulnerability analysis and mitigation

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.

Source: NVD

Related JavaScript vulnerabilities:

CVE ID

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Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-33287HIGH7.5
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CVE-2026-33285HIGH7.5
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CVE-2026-33671HIGH7.5
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CVE-2026-33672MEDIUM5.3
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