CVE-2026-45323 MeshCore Card: XSS vulnerability through meshcore node name
An attacker within radio range can execute arbitrary JavaScript in the Home Assistant frontend via unescaped node names in the MeshCore Card plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-45323?
CVE-2026-45323 is a critical cross-site scripting vulnerability in jpettitt meshcore-card, published on 28 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
MeshCore Card provides MeshCore Lovelace card for Home Assistant. Prior to 0.3.3, Meshcore node names are rendered without HTML escaping in meshcore-card, allowing any node within direct or indirect (repeated) radio range to execute arbitrary javascript in the Home Assistant frontend of anyone viewing the card. This vulnerability is fixed in 0.3.3.
Weakness: CWE-79
Which versions are affected by CVE-2026-45323?
It affects 1 product.
Products include Jpettitt Meshcore Card.
How do I fix CVE-2026-45323?
No fix has been published for CVE-2026-45323 yet. Limit exposure of the affected software until one is available.
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-2026-45323 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45323 exists.
Sources
Also known as GHSA-5vrg-xpcj-xppc.