Cyber Resilience

CVE-2026-45323

CriticalPublic PoCUpdated

Published: 28 May 2026

Published
28 May 2026
Modified
17 June 2026
KEV Added
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Patch
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CVSS Score v3.1 9.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS Score 0.0032 23.5th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-45323 is a critical-severity Cross-site Scripting (CWE-79) vulnerability in Jpettitt Meshcore Card. Its CVSS base score is 9.6 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 23.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability details

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…

more

frontend of anyone viewing the card. This vulnerability is fixed in 0.3.3.

CWE(s)
CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

XSS (CWE-79) in publicly accessible Home Assistant frontend card directly enables exploitation of a public-facing application via arbitrary JavaScript execution.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2024-56060Shared CWE-79
CVE-2022-50908Shared CWE-79
CVE-2026-44669Shared CWE-79
CVE-2025-23882Shared CWE-79
CVE-2025-68501Shared CWE-79
CVE-2025-49043Shared CWE-79
CVE-2025-69316Shared CWE-79
CVE-2025-50006Shared CWE-79
CVE-2025-14320Shared CWE-79
CVE-2025-49045Shared CWE-79

Affected Assets

jpettitt
meshcore card
≤ 0.3.3

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation
addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering
addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

References