CVE-2025-57804

Katalog CVE

CVSS 6.9 · Medium EPSS 1,7%

Kerentanan Improper Neutralization of CRLF Sequences ('CRLF Injection'). Skor CVSS 4.0 6.9 (Medium) menurut github.com.

Deskripsi (NVD)

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Prior to version 4.3.0, an HTTP/2 request splitting vulnerability allows attackers to perform request smuggling attacks by injecting CRLF characters into headers. This occurs when servers downgrade HTTP/2 requests to HTTP/1.1 without properly validating header names/values, enabling attackers to manipulate request boundaries and bypass security controls. This issue has been patched in version 4.3.0.

Rincian

Terbit di NVD

25 Agustus 2025

Terakhir diubah

17 Juni 2026

Status NVD

Deferred

CVSS 4.0

6.9 (Medium), sumber github.com
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')

EPSS (30 hari)

1,7% peluang dieksploitasi; lebih tinggi dari 76,9% 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/python-hyper/h2/commit/035e9899f95e3709af098f578bfc3cd302298e3a
• https://github.com/python-hyper/h2/security/advisories/GHSA-847f-9342-265h
• https://lists.debian.org/debian-lts-announce/2025/09/msg00004.html