CVE-2026-115351

MediumCVSS 4.7/10Last modified Oct 22, 2026

Description

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.

Metrics

CVSS 3.1 4.7/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Weakness enumeration

CWE-94

Affected software

No affected versions have been published.

Timeline

Published: Oct 22, 2026
Last modified: Oct 22, 2026
NVD status: Deferred

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