Is CVE-2026-44896 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-44896 being exploited in the wild.

How severe is CVE-2026-44896?

Medium severity, with a CVSS score of 6.1, published 26 May 2026.

Which products and versions are affected?

mistune (PyPI) <= 3.2.0, ECOSYSTEM:introduced=0,fixed=3.2.1.

Is there a fix for CVE-2026-44896?

Yes. mistune (PyPI): upgrade to 3.2.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-44896 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-44896?

Check whether you run mistune (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-44896: lepture Mistune XSS in Figure directive image attributes

Q: Which products and versions are affected?

mistune (PyPI) <= 3.2.0, ECOSYSTEM:introduced=0,fixed=3.2.1.

Q: Is there a fix for CVE-2026-44896?

Yes. mistune (PyPI): upgrade to 3.2.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-44896 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-44896?

Check whether you run mistune (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-44896 · Severity: medium · CVSS 6.1 · Published 2026-05-26

Mistune is a popular Python library used to convert Markdown text into HTML. A security flaw in how it handles image figures allows an attacker to inject malicious scripts into web pages. If a user views a page containing specially crafted Markdown, the attacker could potentially steal session information or perform actions on the user's behalf.

Technologies: mistune (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-44896 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-44896 being exploited in the wild.
How severe is CVE-2026-44896?: Medium severity, with a CVSS score of 6.1, published 26 May 2026.
Which products and versions are affected?: mistune (PyPI) <= 3.2.0, ECOSYSTEM:introduced=0,fixed=3.2.1.
Is there a fix for CVE-2026-44896?: Yes. mistune (PyPI): upgrade to 3.2.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-44896 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-44896?: Check whether you run mistune (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

mistune (PyPI): upgrade to 3.2.1 or later
```
pip install "mistune>=3.2.1"
```

Technical details

A cross-site scripting (XSS) vulnerability exists in Mistune's `render_figure()` function within `src/mistune/directives/image.py`. The function fails to escape the `figclass` and `figwidth` options before concatenating them into HTML attributes, leading to attribute injection. This bypasses the standard `HTMLRenderer(escape=True)` setting because these specific directive values are handled outside the primary inline renderer. An attacker can exploit this by providing a malicious Markdown figure directive that includes JavaScript or other malicious HTML attributes. The issue is fixed in version 3.2.1.

Affected products

lepture mistune <= 3.2.0

Identifiers

CVE-2026-44896
GHSA-58cw-g322-p94v
PYSEC-2026-168

Timeline

2026-05-06: disclosed
2026-05-08: advisory: GitHub Advisory published
2026-05-26: advisory: NVD published

References

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