PYSEC-2026-2618

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Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/malla/PYSEC-2026-2618.yaml
JSON Data
https://api.osv.dev/v1/vulns/PYSEC-2026-2618
Aliases
Published
2026-07-13T15:46:14Z
Modified
2026-07-13T16:32:12Z
Severity
  • 6.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L CVSS Calculator
Summary
malla: Stored XSS via Meshtastic node names in multiple frontend pages
Details

Node 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.

Affected files:

  • src/malla/templates/traceroute_graph.html (line ~832)
  • src/malla/templates/map.html (lines ~945, 1078)
  • src/malla/templates/packet_detail.html (lines ~1402, 1452)
  • src/malla/static/js/relay_node_analysis.js (line ~124)

Steps to reproduce

  1. Publish a Meshtastic NODEINFO_APP packet to any public MQTT broker with long_name set to a HTML entity i.e <img src=x onerror=alert(1)>
  2. Wait for malla-capture to store it
  3. Open the dashboard

Impact

Allows unauthenticated remote attackers to execute arbitrary JavaScript in the browser, such as:

  • Phishing overlays
  • Force redirect to malicious websites
  • Injection of arbitrary third-party scripts (no CSP restrictions)
  • Browser resource abuse
  • Persistent dashboard denial of service
References

Affected packages

PyPI / malla

Package

Name
malla
View open source insights on deps.dev
Purl
pkg:pypi/malla

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Last Affected
0.1.7

Affected versions

0.*
0.1.0
0.1.1
0.1.2
0.1.3
0.1.4
0.1.5
0.1.6
0.1.7

Database specific

source 
"https://github.com/pypa/advisory-database/blob/main/vulns/malla/PYSEC-2026-2618.yaml"