CVE-2026-115351Mistune 3.2.1 before 3.3.0 CSS Injection via Figure Directive figwidth Option

Beschreibung

Mistune from 3.2.1 before 3.3.0 contains a CSS injection vulnerability that allows attackers controlling markdown input to inject arbitrary style declarations via the unvalidated figwidth option of the figure directive. Attackers can append declarations like background:url() to the rendered figure style attribute, forcing victim browsers to send requests to attacker servers and leak attribute values.

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Referenzen und Patches

• GitHub Security Advisory (GHSA-xmwc-wjpr-q378) vendor-advisory
• VulnCheck Advisory: Mistune 3.2.1 before 3.3.0 CSS Injection via Figure Directive figwidth Option third-party-advisory