CVE-2026-79720 Cross-site scripting in Netron

Q: Which versions are affected by CVE-2026-79720?

1 open source package ship an affected version, including netron. It affects 1 product.

Q: Is CVE-2026-79720 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-79720 exists.

Q: How do I fix CVE-2026-79720?

Upgrade netron to 9.1.3 or later.

Medium 6.8 Published 27 Aug 2026 Updated 27 Aug 2026

Attackers can exploit reflected XSS in Netron to hide nodes, scan ports, or achieve remote code execution via a Chrome vulnerability.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2026-79720?

CVE-2026-79720 is a medium-severity cross-site scripting vulnerability in Netron, published on 27 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Reflected XSS in Netron versions <=9.1.2 on desktop application through unsanitized node names allows an attacker to hide certain nodes, perform port scanning or abuse a Chrome n-day to achieve Remote Code Execution.

Weakness: CWE-79

Which versions are affected by CVE-2026-79720?

1 open source package ship an affected version, including netron. It affects 1 product.

Package	Affected	Fixed in
`netron` PyPI	All versions	`9.1.3`

Products include Lutzroeder Netron.

How do I fix CVE-2026-79720?

Upgrade netron to 9.1.3 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-79720 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-79720 exists.

Sources

Also known as GHSA-cc8h-gpwh-gq9r, PYSEC-2026-3747.