{"id":"EUVD-2026-95112","revision":"befe7981c0be430d930ed7aa5a0d4918","records":[{"revision":"befe7981c0be430d930ed7aa5a0d4918","observedAt":"2026-11-09T05:07:39.33+00:00","statement":{"source":"euvd","id":"EUVD-2026-95112","aliases":["CVE-2026-107301","GHSA-8hq7-ggx2-cc6m"],"title":"msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, constructing msgpack5 with an empty or partial options object disables the default protoAction: 'error' protection. A decoded map containing a __proto__ ke…","description":"msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, constructing msgpack5 with an empty or partial options object disables the default protoAction: 'error' protection. A decoded map containing a __proto__ key can then replace the decoded object's prototype, potentially changing inherited properties or downstream behavior, although Object.prototype is not modified globally. This issue is fixed in version 6.1.0.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L","score":6.5,"severity":null}],"references":["https://github.com/mcollina/msgpack5/security/advisories/GHSA-8hq7-ggx2-cc6m","https://github.com/mcollina/msgpack5/commit/20e82600ac9462e679c8a45e5723315f21e2c774","https://github.com/mcollina/msgpack5/releases/tag/v6.1.0"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95112","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 8, 2026, 5:13:00 PM","dateUpdated":"Oct 14, 2026, 1:02:53 AM"},"relatedAdvisories":[{"id":"msrc_CVE-2026-107301","title":"msgpack5: Partial options disable prototype protection","vulnerabilityIds":["CVE-2026-107301"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-95112","identifiers":["EUVD-2026-95112","CVE-2026-107301","GHSA-8hq7-ggx2-cc6m"]},"retained":false,"historicalAffected":[]}],"coverage":[]}