CVE-2026-44899
Mistune Image Directive CSS Injection Vulnerability
4.7
MEDIUM
CVSS 3.1
EPSS 0.23%
描述
Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, the Image directive plugin validates the :width: and :height: options with a regex compiled as _num_re = re.compile(r"^\d+(?:\.\d*)?"). When the validated value is not a plain integer, render_block_image() inserts it directly into a style="width:...;" or style="height:...;" attribute. Because the value was accepted by the prefix-only regex, any CSS after the leading digits reaches the style= attribute verbatim and without escaping. This vulnerability is fixed in 3.2.1.
如何修補 CVE-2026-44899
要修補 CVE-2026-44899,請將受影響套件升級到下列已修補版本。
- —升級至 3.2.1 或更新版本
- —升級至 3.2.1 或更新版本
CVE-2026-44899 正在被利用嗎?
低 — EPSS 為 0.2%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- >= 3.2.0, < 3.2.1
- from 0, < 3.2.1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.7 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N |