Stencil core 4.43.5 contains a DOM-based cross-site scripting (XSS) vulnerability in the component runtime. When a downstream application enables the experimental slot fixes option and uses scoped components, assigning a string to the textContent property of such a component's host element causes the value to be parsed as HTML instead of being inserted as text. If an application writes attacker-controlled data to these host elements, the data can be interpreted as markup and script can execute in the context of the application's origin.

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History

Thu, 24 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 21 Sep 2026 21:15:00 +0000

Type Values Removed Values Added
Title DOM‑Based XSS via textContent Assignment in Stencil Core Component Runtime
Weaknesses CWE-79

Mon, 21 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
Description Stencil core 4.43.5 contains a DOM-based cross-site scripting (XSS) vulnerability in the component runtime. When a downstream application enables the experimental slot fixes option and uses scoped components, assigning a string to the textContent property of such a component's host element causes the value to be parsed as HTML instead of being inserted as text. If an application writes attacker-controlled data to these host elements, the data can be interpreted as markup and script can execute in the context of the application's origin.
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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-24T12:49:11.875Z

Reserved: 2026-08-25T00:00:00.000Z

Link: CVE-2026-79320

cve-icon Vulnrichment

Updated: 2026-09-24T12:48:44.386Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-21T20:17:32.823

Modified: 2026-09-24T13:17:11.380

Link: CVE-2026-79320

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-21T21:00:07Z

Weaknesses