CVE-2026-86252
h3 versions before 1.15.9 fail to sanitize carriage return characters in EventStream data and comment fields, allowing attackers to inject a
CVSS
5.3
Medio
EPSS
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KEV
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Exploit Today
0
0-100
Publicado: 6 sept 2026 · Última mod.: 6 sept 2026 · CWE-74
Sin historial EPSS suficiente todavía.
h3 versions before 1.15.9 fail to sanitize carriage return characters in EventStream data and comment fields, allowing attackers to inject arbitrary SSE events by including unsanitized carriage returns. Attackers can inject event type directives, split single push calls into multiple browser-parsed events, or escape comment fields to inject data, bypassing the prior CVE fix that only addressed newline injection.
CVECVSSEPSSKEVRExplotTítuloVis.
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