{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-86440", "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "state": "PUBLISHED", "assignerShortName": "CIRCL", "dateReserved": "2026-09-07T12:35:06.572Z", "datePublished": "2026-09-07T12:35:10.174Z", "dateUpdated": "2026-09-08T14:51:34.403Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "MISP", "repo": "https://github.com/MISP/MISP", "vendor": "MISP", "versions": [{"lessThanOrEqual": "2.5.45", "status": "affected", "version": "0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Scottish Government - National Cyber Team"}, {"lang": "en", "type": "remediation developer", "value": "iglocska"}, {"lang": "en", "type": "remediation developer", "value": "Claude Opus 5 (1M context)"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<h3></h3>\n<p>Affected versions of MISP insufficiently validate URLs used by dashboard widgets, particularly the Button widget.</p>\n<p>The widget's URL is stored configuration controlled by a user. 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