CVE-2026-86252

Katalog CVE

CVSS 5.3 · Medium EPSS 0,36%

Kerentanan Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'). Skor CVSS 3.1 5.3 (Medium) menurut vulncheck.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

6 September 2026

Terakhir diubah

8 September 2026

Status NVD

Awaiting Analysis

CVSS 3.1

5.3 (Medium), sumber vulncheck.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

EPSS (30 hari)

0,36% peluang dieksploitasi; lebih tinggi dari 27,9% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://github.com/h3js/h3/security/advisories/GHSA-4hxc-9384-m385
• https://www.vulncheck.com/advisories/h3-before-1.15.9-sse-event-injection-via-carriage-return