CVE-2020-26890: matrix synapse +1 lainnya

csirt@kutim:~/threat-intel/cve/CVE-2020-26890

CVSS 7.5 · High EPSS 3,0%

Kerentanan Improper Input Validation pada matrix synapse, fedoraproject fedora. Skor CVSS 3.1 7.5 (High) menurut NVD.

Deskripsi (NVD)

Matrix Synapse before 1.20.0 erroneously permits non-standard NaN, Infinity, and -Infinity JSON values in fields of m.room.member events, allowing remote attackers to execute a denial of service attack against the federation and common Matrix clients. If such a malformed event is accepted into the room's state, the impact is long-lasting and is not fixed by an upgrade to a newer version, requiring the event to be manually redacted instead. Since events are replicated to servers of other room members, the impact is not constrained to the server of the event sender.

Rincian

Terbit di NVD: 24 November 2020
Terakhir diubah: 17 Juni 2026
Status NVD: Modified
CVSS 3.1: 7.5 (High), sumber NVD
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-20: Improper Input Validation
EPSS (30 hari): 3,0% peluang dieksploitasi; lebih tinggi dari 87,0% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
matrix	synapse	Semua versi sebelum 1.20.0
fedoraproject	fedora	Versi 32
fedoraproject	fedora	Versi 33

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:10 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.