CVE-2026-44896
Fixed in a distro release EPSS <1%CVSS 5.3
Mistune is a Python Markdown parser with renderers and plugins. In 3.2.0 and earlier, 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. Version 3.2.1 contains a patch.
Products: lepture mistune
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| PyPI | mistune | 3.2.1 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | datahub-ingestion-fips | 1.5.0.1-r2 |
| Chainguard | kubeflow-pipelines-visualization-server | 2.16.1-r2 |
| Debian 12 | mistune | no fix |
| Debian 13 | mistune | no fix |
| Debian 14 | mistune | no fix |
| SUSE Linux Enterprise Server 16.0 | python-mistune | 3.1.3-160000.5.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | python-mistune | 3.1.3-160000.5.1 |
| Ubuntu 16.04 LTS | mistune | no fix |
| Ubuntu 18.04 LTS | mistune | no fix |
| Ubuntu 20.04 LTS | mistune | no fix |
| Ubuntu 22.04 LTS | mistune | no fix |
| Ubuntu 22.04 LTS | mistune0 | no fix |
| Ubuntu 24.04 LTS | mistune | no fix |
| Ubuntu 24.04 LTS | mistune0 | no fix |
| Ubuntu 25.10 | mistune | no fix |
| Ubuntu 25.10 | mistune0 | no fix |
| Ubuntu 26.04 LTS | mistune | no fix |
| Ubuntu 26.04 LTS | mistune0 | no fix |
| Ubuntu 26.10 | mistune | no fix |
| Ubuntu 26.10 | mistune0 | no fix |
| Wolfi | kubeflow-pipelines-visualization-server | 2.16.1-r2 |
| openSUSE Leap 16.0 | python-mistune | 3.1.3-160000.5.1 |