{"cve":"CVE-2026-6594","nvd":{"published":"2026-04-20T02:16:15.633","modified":"2026-10-26T21:10:00.170","status":"Deferred","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.","cvss_v4":{"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","score":6.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","score":7.3},"cwes":["CWE-94","CWE-1321"],"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"],"products":[],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-6594","score":0.00336,"percentile":0.26726,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-3jc6-6r48-v6qf","url":"https://osv.dev/vulnerability/GHSA-3jc6-6r48-v6qf","summary":"Deep Merge is Vulnerable to Prototype Pollution Through Lack of Sanitization","modified":"2026-04-23T14:41:23.150521Z","packages":[{"ecosystem":"npm","name":"@brikcss/merge","purl":"pkg:npm/%40brikcss/merge","ranges":["<=1.3.1"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}