CVE-2026-56821: netty — Katalog CVE

csirt@kutim:~/threat-intel/cve/CVE-2026-56821

CVSS 7.4 · High EPSS 0,22%

Kerentanan Improper Check for Certificate Revocation pada netty. Skor CVSS 3.1 7.4 (High) menurut github.com.

Deskripsi (NVD)

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, the OcspServerCertificateValidator flags an out-of-date OCSP response but does not stop processing it, so an expired GOOD response is still reported as VALID, letting an on-path attacker replay a stale GOOD response to bypass revocation of a since-revoked certificate. Exploitation can lead to certificate revocation bypass via replay of an expired OCSP response. Any application using OcspServerCertificateValidator is affected; a revoked certificate can be accepted. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.

Rincian

Terbit di NVD: 29 Juli 2026
Terakhir diubah: 7 Agustus 2026
Status NVD: Analyzed
CVSS 3.1: 7.4 (High), sumber github.com
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-299: Improper Check for Certificate Revocation
EPSS (30 hari): 0,22% peluang dieksploitasi; lebih tinggi dari 11,4% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
netty	netty	Semua versi sebelum 4.1.136
netty	netty	Versi 4.2.0 hingga sebelum 4.2.16

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://github.com/netty/netty/security/advisories/GHSA-g7hg-vrcf-mvmr exploit · advisory vendor

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.