CVE-2026-54340

Katalog CVE

CVSS 7.5 · High EPSS 0,49%

Kerentanan Uncontrolled Resource Consumption pada h2o. Skor CVSS 3.1 7.5 (High) menurut github.com.

Deskripsi (NVD)

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 9265bdd, there is an HTTP/2 state amplification issue that combines HPACK decompression amplification with Slowloris-style stream stalling. Amplified decoded header state can be retained by stalled HTTP/2 streams, and depending on the configuration, additional limits are needed to bound decoded header state and prevent attack. This issue has been fixed by commit 9265bdd.

Rincian

Terbit di NVD

17 Juli 2026

Terakhir diubah

5 Agustus 2026

Status NVD

Analyzed

CVSS 3.1

7.5 (High), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-400: Uncontrolled Resource Consumption
CWE-770: Allocation of Resources Without Limits or Throttling

EPSS (30 hari)

0,49% peluang dieksploitasi; lebih tinggi dari 40,6% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/h2o/h2o/commit/9265bdd9a996ed992681055e3996baf3e09d2063 patch
• https://github.com/h2o/h2o/security/advisories/GHSA-qcrr-wrhc-pgq9 advisory pihak ketiga