Vulnerability Details CVE-2026-44896
Mistune is a Python Markdown parser with renderers and plugins. In 3.2.0 and realier, in src/mistune/directives/image.py, the render_figure() function concatenates figclass and figwidth options directly into HTML attributes without escaping. This allows attribute injection and XSS even when HTMLRenderer(escape=True) is used, because these values bypass the inline renderer.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 9.8%
CVSS Severity
CVSS v3 Score 6.1
Products affected by CVE-2026-44896
-
cpe:2.3:a:mistune_project:mistune:0.1.0
-
cpe:2.3:a:mistune_project:mistune:0.2.0
-
cpe:2.3:a:mistune_project:mistune:0.3.0
-
cpe:2.3:a:mistune_project:mistune:0.3.1
-
cpe:2.3:a:mistune_project:mistune:0.4
-
cpe:2.3:a:mistune_project:mistune:0.4.1
-
cpe:2.3:a:mistune_project:mistune:0.5
-
cpe:2.3:a:mistune_project:mistune:0.5.1
-
cpe:2.3:a:mistune_project:mistune:0.6
-
cpe:2.3:a:mistune_project:mistune:0.7
-
cpe:2.3:a:mistune_project:mistune:0.7.1
-
cpe:2.3:a:mistune_project:mistune:0.7.2
-
cpe:2.3:a:mistune_project:mistune:0.7.3
-
cpe:2.3:a:mistune_project:mistune:0.7.4
-
cpe:2.3:a:mistune_project:mistune:0.8
-
cpe:2.3:a:mistune_project:mistune:0.8.1
-
cpe:2.3:a:mistune_project:mistune:0.8.2
-
cpe:2.3:a:mistune_project:mistune:0.8.3
-
cpe:2.3:a:mistune_project:mistune:0.8.4
-
cpe:2.3:a:mistune_project:mistune:2.0.0
-
cpe:2.3:a:mistune_project:mistune:2.0.1
-
cpe:2.3:a:mistune_project:mistune:2.0.2
-
cpe:2.3:a:mistune_project:mistune:2.0.3
-
cpe:2.3:a:mistune_project:mistune:2.0.4
-
cpe:2.3:a:mistune_project:mistune:2.0.5
-
cpe:2.3:a:mistune_project:mistune:3.0.0
-
cpe:2.3:a:mistune_project:mistune:3.0.1
-
cpe:2.3:a:mistune_project:mistune:3.0.2
-
cpe:2.3:a:mistune_project:mistune:3.1.0
-
cpe:2.3:a:mistune_project:mistune:3.1.1
-
cpe:2.3:a:mistune_project:mistune:3.1.2
-
cpe:2.3:a:mistune_project:mistune:3.1.3
-
cpe:2.3:a:mistune_project:mistune:3.1.4
-
cpe:2.3:a:mistune_project:mistune:3.2.0