CVE-2026-118255

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{"bugzilla": {"description": "grid: Highcharts Grid: Cross-site scripting via unvalidated URL scheme in credit links", "id": "2563082", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2563082"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-79", "details": ["Highcharts JS is a JavaScript charting library based on SVG. From 2.0.0 until 3.2.0, Highcharts Grid applies credits.href to the credits link without validating the URL scheme. An attacker who controls Grid configuration can provide a javascript URL, and activating the credits link runs script in the origin of the hosting page with access to that application's data and session state.This issue is fixed in Grid Pro 3.2.0.", "A flaw was found in Highcharts Grid. The component fails to validate URL schemes in credit links, allowing an attacker who controls the grid configuration to inject a malicious JavaScript link. When a user clicks the link, arbitrary script executes within the origin of the hosting web application, potentially leading to unauthorized data disclosure or session hijacking."], "name": "CVE-2026-118255", "public_date": "2026-10-28T18:17:14Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-118255\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-118255\nhttps://github.com/highcharts/highcharts/commit/45b74403acafbe9f621c4a343506721d9129e991\nhttps://github.com/highcharts/highcharts/pull/25351\nhttps://github.com/highcharts/highcharts/releases/tag/grid-v3.2.0\nhttps://github.com/highcharts/highcharts/security/advisories/GHSA-6hgp-fmhr-mrg4"], "statement": "This vulnerability is rated as having Moderate severity because exploitation requires specific prerequisites, including the ability to influence grid configuration settings and active interaction from a user clicking the credit hyperlink. Because this issue resides in a client-side charting component, execution is confined to the victim's browser session within the web application origin rather than compromising server infrastructure directly. Environments where chart configuration is strictly server-controlled or attribution links are not exposed are not susceptible to this cross-site scripting risk.", "threat_severity": "Moderate"}

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