CVE-2026-33347: thephpleague commonmark

csirt@kutim:~/threat-intel/cve/CVE-2026-33347

CVSS 6.1 · Medium EPSS 0,32%

Kerentanan Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') pada thephpleague commonmark. Skor CVSS 3.1 6.1 (Medium) menurut NVD.

Deskripsi (NVD)

league/commonmark is a PHP Markdown parser. From version 2.3.0 to before version 2.8.2, the DomainFilteringAdapter in the Embed extension is vulnerable to an allowlist bypass due to a missing hostname boundary assertion in the domain-matching regex. An attacker-controlled domain like youtube.com.evil passes the allowlist check when youtube.com is an allowed domain. This issue has been patched in version 2.8.2.

Rincian

Terbit di NVD: 24 Maret 2026
Terakhir diubah: 17 Juni 2026
Status NVD: Analyzed
CVSS 3.1: 6.1 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-185: Incorrect Regular Expression
CWE-918: Server-Side Request Forgery (SSRF)
EPSS (30 hari): 0,32% peluang dieksploitasi; lebih tinggi dari 22,8% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
thephpleague	commonmark	Versi 2.3.0 hingga sebelum 2.8.2

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://github.com/thephpleague/commonmark/security/advisories/GHSA-hh8v-hgvp-g3f5 mitigasi · advisory vendor
https://github.com/thephpleague/commonmark/commit/59fb075d2101740c337c7216e3f32b36c204218b patch
https://github.com/thephpleague/commonmark/releases/tag/2.8.2 product · release notes

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.