CVE-2026-71478

6.1 Moyenne

Publiée le 07/08/2026 à 00:18 · Modifiée le 10/09/2026 à 22:41 · En attente d'analyse NVD · Source : security-advisories@github.com

Description

league/commonmark is a PHP library for parsing and rendering CommonMark Markdown. From 1.5.0 until 2.9.0, the AttributesExtension's href and src unsafe-link filter can be bypassed by embedding control bytes, such as a tab, carriage return, line feed, or leading C0 control character, in a javascript: URL that browsers discard before parsing the scheme, causing the browser to still execute the script even when the unsafe-link filter is enabled. This issue is fixed in 2.9.0.

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Produits concernés

thephpleague commonmark

Scores CVSS

Version	Score	Source	Vecteur
3.1	6.1 Moyenne	security-advisories@github.com	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`

Faiblesses (CWE)

CWE-79
CWE-86
CWE-692

Références

https://github.com/thephpleague/commonmark/commit/493a5aa7d65754b73846006eaff9c2c4431a8e2c
https://github.com/thephpleague/commonmark/releases/tag/2.9.0
https://github.com/thephpleague/commonmark/security/advisories/GHSA-29pj-957v-52mc
https://github.com/thephpleague/commonmark/security/advisories/GHSA-29pj-957v-52mc

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories