Is CVE-2026-104250 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-104250 being exploited in the wild.

How severe is CVE-2026-104250?

Medium severity, with a CVSS score of 6.1, published 13 October 2026.

Which products and versions are affected?

unstructured (PyPI) <= 0.24.0, ECOSYSTEM:introduced=0,fixed=0.24.1; Unstructured-Io Unstructured 0.23.3 and likely earlier.

Is there a fix for CVE-2026-104250?

Yes. unstructured (PyPI): upgrade to 0.24.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-104250 attacked?

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

Am I affected by CVE-2026-104250?

Check whether you run unstructured (PyPI) or Unstructured-Io Unstructured 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-2026-104250: unstructured library stored XSS via unescaped HTML generation

Q: Which products and versions are affected?

unstructured (PyPI) <= 0.24.0, ECOSYSTEM:introduced=0,fixed=0.24.1; Unstructured-Io Unstructured 0.23.3 and likely earlier.

Q: Is there a fix for CVE-2026-104250?

Yes. unstructured (PyPI): upgrade to 0.24.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-104250 attacked?

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

Q: Am I affected by CVE-2026-104250?

Check whether you run unstructured (PyPI) or Unstructured-Io Unstructured 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-2026-104250 · Severity: medium · CVSS 6.1 · Published 2026-10-13

The unstructured library processes documents and generates HTML output, but fails to escape malicious markup embedded in input documents. When a user views HTML generated from an untrusted document in a web browser, embedded scripts execute automatically or on user interaction, potentially allowing an attacker to steal credentials, session tokens, or other sensitive data from the viewer's session.

Technologies: unstructured (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-104250 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-104250 being exploited in the wild.
How severe is CVE-2026-104250?: Medium severity, with a CVSS score of 6.1, published 13 October 2026.
Which products and versions are affected?: unstructured (PyPI) <= 0.24.0, ECOSYSTEM:introduced=0,fixed=0.24.1; Unstructured-Io Unstructured 0.23.3 and likely earlier.
Is there a fix for CVE-2026-104250?: Yes. unstructured (PyPI): upgrade to 0.24.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-104250 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-104250?: Check whether you run unstructured (PyPI) or Unstructured-Io Unstructured 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

unstructured (PyPI): upgrade to 0.24.1 or later
```
pip install "unstructured>=0.24.1"
```

Technical details

The `to_html()` function in `documents/ontology.py` performs no HTML escaping when converting parsed document elements to HTML output, leaving event handler attributes (e.g., `onerror`, `onmouseover`), `javascript:` URL schemes, and other malicious markup from input documents unescaped. An attacker can embed payloads like `<img src=x onerror="...">` or `<a href="javascript:...">` in a document submitted to an ingestion pipeline; when a downstream user renders the generated HTML, the payload executes with no user interaction required for image-based vectors.

Affected products

unstructured-io unstructured 0.23.3 and likely earlier

Identifiers

CVE-2026-104250
GHSA-v5mq-3xhg-98m9

Timeline

2026-10-15: disclosed

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