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CVE-2026-45323

Jpettitt Meshcore Card cross-site scripting (XSS)

9.6 CRITICALPublic exploitEPSS 0.48%
  1. Published28 May 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Affected products

Jpettitt Meshcore Card< 0.3.3

Remediation

Fixed in
Jpettitt Meshcore Card≥ 0.3.3

References

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Frequently asked

Is CVE-2026-45323 being actively exploited?

CVE-2026-45323 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.48%.

How severe is CVE-2026-45323?

CVE-2026-45323 has a CVSS 3.1 base score of 9.6, rated critical. EPSS estimates a 0.48% probability of exploitation.

Which products are affected by CVE-2026-45323?

Affected products include Jpettitt Meshcore Card.

How do I fix CVE-2026-45323?

Upgrade affected software to a fixed version, for example Jpettitt Meshcore Card 0.3.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-45323 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.