{"id":"CVE-2026-6594","revision":"ec328452602340c29c917ad52e31917d","records":[{"revision":"ec328452602340c29c917ad52e31917d","observedAt":"2026-10-27T15:46:32.124+00:00","statement":{"source":"nvd","id":"CVE-2026-6594","aliases":[],"title":"A vulnerability was determined in brikcss merge up to 1.3.0. This affects an unknown part. Executing a manipulation of the argument __proto__/constructor.prototype/prototype can lead to improperly controlled modification of object prototype…","description":"A vulnerability was determined in brikcss merge up to 1.3.0. This affects an unknown part. Executing a manipulation of the argument __proto__/constructor.prototype/prototype can lead to improperly controlled modification of object prototype attributes. The attack may be performed from remote. The vendor was contacted early about this disclosure but did not respond in any way.","state":0,"publishedAt":"2026-04-20T02:16:15.633+00:00","modifiedAt":"2026-10-26T21:10:00.17+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · cna@vuldb.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":6.9,"severity":"MEDIUM"},{"system":"CVSS 3.1 · cna@vuldb.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","score":7.3,"severity":"HIGH"},{"system":"CVSS 2.0 · cna@vuldb.com · Secondary","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","score":7.5,"severity":"HIGH"}],"references":["https://github.com/sudo-secure/security-research/blob/main/brikcss-merge/prototype-pollution/PoC.md","https://vuldb.com/submit/791805","https://vuldb.com/vuln/358229","https://vuldb.com/vuln/358229/cti"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-6594","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-94","CWE-1321"],"productCriteria":[],"sourceDates":{"published":"2026-04-20T02:16:15.633","lastModified":"2026-10-26T21:10:00.170"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-6594","identifiers":["CVE-2026-6594"]},"retained":false,"historicalAffected":[]}],"coverage":[]}