CVE-2026-105830

league/commonmark 2.0.0 before 2.10.2 Quadratic DoS via TableStartParser

HIGH 8.7

En bref

Source: NVD
EPSS: EPSS 0.37 % · centile 31 (2026-10-28)
État: PUBLISHED
Publiée: 2026-10-08 14:10 UTC
Mise à jour: 2026-10-08 17:03 UTC
Attribuée par: VulnCheck
Statut NVD: Awaiting Analysis

Description

league/commonmark from 2.0.0 before 2.10.2 contains a quadratic-time denial of service vulnerability in the GitHub Flavored Markdown Table extension's TableStartParser::tryStart() block-start scan. Unauthenticated attackers can submit a large paragraph of pipe-free lines not starting with letters, forcing repeated full-buffer strpos scans that exhaust PHP worker CPU.

Faiblesses (CWE)

CWE-400 — Consommation de ressources non maîtrisée (déni de service)

Références

Scores

Version	Score	Vecteur	Évalué par
CVSS 4.0	HIGH 8.7	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	VulnCheck
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	VulnCheck
CVSS 4.0	HIGH 8.7	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD · disclosure@vulncheck.com (Secondary)
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · disclosure@vulncheck.com (Secondary)

Avis

GHSA-3q6v-r5mr-hxv8 — league/commonmark: Quadratic-time denial of service in the GitHub Flavored Markdown Table extension block-start scan

Références européennes

ENISA EUVD · EUVD-2026-95017
GCVE · GCVE-0-2026-105830

Produits affectés

Produit	Versions
thephpleague · commonmark	affected 2.0.0 < 2.10.2 ; unaffected 2.10.2

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD