# 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 Rem...

Advisory record · `PYSEC-2026-4002`

- **Identifiers:** `PYSEC-2026-4002` · `CVE-2026-79719`
- **State:** Confirmed
- **Severity:** CVSS 6.8 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-79](https://cwe.mitre.org/data/definitions/79.html)
- **Tags:** [Cross-site scripting (XSS)](https://agentprime.io/advisories/tag/xss.md)
- **Published:** 27 Aug 2026
- **Updated:** 30 Sept 2026
- **Reviewed by a person:** No

Published by OSV at 27 Aug 2026, 17:20 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `netron` (PyPI): affected `<9.1.3`; fixed in `9.1.3`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Netron versions up to and including 9.1.2 are affected by a reflected cross-site scripting flaw in the desktop application, caused by node names that are not sanitized. An attacker who can get a user to open a crafted model file could hide certain nodes, perform port scanning, or chain a Chrome n-day to achieve remote code execution. Upgrade netron to version 9.1.3 or later.

Written 1 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 6.8 Medium, CVSS 4.0: `CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N`, from CNA (HiddenLayer)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0026, the 18th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:09 UTC: First seen by agentprime
- 31 Oct 2026, 14:09 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/PYSEC-2026-4002)

## Sources

- [OSV: PYSEC-2026-4002](https://osv.dev/vulnerability/PYSEC-2026-4002)
- <https://github.com/lutzroeder/netron/commit/cd14bad8c9132b1aaf1d197fe61925575f194f00>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/PYSEC-2026-4002>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/PYSEC-2026-4002/>. Everything for agents: <https://agentprime.io/llms.txt>.