# CVE-2026-79719: Netron reflected XSS in sidebar node rendering

Source: https://junglewise.ai/threats/cve-2026-79719-netron-reflected-xss-in-sidebar-node-rendering  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-27. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-79719 · Severity: low · CVSS 3.1 · Published 2026-08-27

Netron is a viewer application for machine learning model files. An attacker can craft a malicious model file that injects arbitrary HTML and JavaScript into the application's sidebar when displayed. In the desktop version, this allows attackers to make unrestricted requests to local services or chain the vulnerability with browser exploits to achieve complete system compromise.

Technologies: [netron (PyPI)](https://junglewise.ai/threats/technologies/pypi-netron). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2026-79719 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-79719 being exploited in the wild.

**How severe is CVE-2026-79719?** Low severity, with a CVSS score of 3.1, published 27 August 2026.

**Which products and versions are affected?** netron (PyPI) ECOSYSTEM:introduced=0,fixed=9.1.3.

**Is there a fix for CVE-2026-79719?** Yes. netron (PyPI): upgrade to 9.1.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-79719 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-79719?** Check whether you run netron (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

- netron (PyPI): upgrade to 9.1.3 or later

  ```sh
  pip install "netron>=9.1.3"
  ```


## Technical details

Netron contains a reflected cross-site scripting (XSS) vulnerability caused by rendering user-controlled model fields (node names, input/output descriptions) directly into the DOM via innerHTML without HTML escaping. The vulnerability is triggered when a user opens a crafted model file and clicks on a node, which populates the sidebar. While the application implements a Content Security Policy (CSP) blocking inline scripts, it does not restrict iframe framing, allowing attackers to bypass restrictions. In the Electron-based desktop application (shipping Chrome 148), this XSS can be chained with known V8 vulnerabilities to achieve remote code execution. The vulnerability affects all versions up to and including 9.1.2; a patch was released in version 9.1.3.

## Affected products

- Lutz Roeder Netron <=9.1.2

## Identifiers

- CVE-2026-79719
- PYSEC-2026-4002

## Timeline

- 2026-08-27: disclosed
- 2026-08-27: patched: Fixed in version 9.1.3

## References

- [https://github.com/lutzroeder/netron/commit/cd14bad8c9132b1aaf1d197fe61925575f194f00](https://github.com/lutzroeder/netron/commit/cd14bad8c9132b1aaf1d197fe61925575f194f00)
- [https://www.hiddenlayer.com/sai-security-advisory/2026-08-netron](https://www.hiddenlayer.com/sai-security-advisory/2026-08-netron)

## Related threats

- [Netron reflected XSS in desktop application via unsanitized node names](https://junglewise.ai/threats/cve-2026-79720-netron-reflected-xss-in-desktop-application-via-unsanitized-node)
- [Netron reflected XSS in sidebar through unsanitized node names](https://junglewise.ai/threats/cve-2026-79718-netron-reflected-xss-in-sidebar-through-unsanitized-node-names)