CVE-2026-86429

Katalog CVE

CVSS 7.5 · High EPSS 0,52%

Kerentanan Inefficient Algorithmic Complexity pada thephpleague commonmark. Skor CVSS 3.1 7.5 (High) menurut vulncheck.com.

Deskripsi (NVD)

The league/commonmark (thephpleague/commonmark) library in versions >= 1.5.0 and < 2.9.1 contains quadratic parsing complexity in its SmartPunctExtension and AttributesExtension. When either extension is explicitly registered on the Environment (they are not enabled by default and are excluded from the standard CommonMark and GitHub-Flavored Markdown converters), an unauthenticated attacker can submit small, specially crafted Markdown documents — such as text alternating with unpaired quotes, contiguous runs of block-level attribute blocks, or repeated class attributes — to trigger disproportionate CPU consumption and cause a denial of service. Fixed in 2.9.1.

Rincian

Terbit di NVD

7 September 2026

Terakhir diubah

8 Oktober 2026

Status NVD

Analyzed

CVSS 3.1

7.5 (High), sumber vulncheck.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-407: Inefficient Algorithmic Complexity

EPSS (30 hari)

0,52% peluang dieksploitasi; lebih tinggi dari 42,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/thephpleague/commonmark/security/advisories/GHSA-jjv6-8j6v-6j52 mitigasi · advisory vendor
• https://www.vulncheck.com/advisories/commonmark-before-2.9.1-denial-of-service-via-smartpunct-and-attributes advisory pihak ketiga