{"id":"CVE-2026-54737","title":"@phun-ky/defaults-deep is a library like lodash defaultsDeep with array preservation and no lodash dependency","summary":"@phun-ky/defaults-deep is a library like lodash defaultsDeep with array preservation and no lodash dependency. Prior to 2.0.5, defaultsDeep() recursively merges user-supplied objects without filtering proto, constructor, and prototype, a…","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","cwe":["CWE-1321"],"vendor":"phun-ky","product":"@phun-ky/defaults-deep","affected":["@phun-ky/defaults-deep < 2.0.5"],"patched":["@phun-ky/defaults-deep 2.0.5"],"published":"2026-07-31","updated":"2026-09-10","sourceUpdated":"2026-09-10T20:12:43.783","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54737","references":[{"url":"https://github.com/phun-ky/defaults-deep/commit/807dba930f8718f9126cad59d949b8fd3539b059","label":"security-advisories@github.com"},{"url":"https://github.com/phun-ky/defaults-deep/pull/49","label":"security-advisories@github.com"},{"url":"https://github.com/phun-ky/defaults-deep/releases/tag/2.0.5","label":"security-advisories@github.com"},{"url":"https://github.com/phun-ky/defaults-deep/security/advisories/GHSA-mj3g-7xcc-x4vh","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-mj3g-7xcc-x4vh"}],"tags":["nvd","ghsa","npm"],"epss":0.00262,"epssPercentile":0.18314,"aliases":["GHSA-mj3g-7xcc-x4vh"],"ecosystem":"npm","ingestedAt":"2026-07-31T18:00:26.909Z","slug":"CVE-2026-54737","body":"## Overview\n\n@phun-ky/defaults-deep is a library like lodash defaultsDeep with array preservation and no lodash dependency. Prior to 2.0.5, defaultsDeep() recursively merges user-supplied objects without filtering proto, constructor, and prototype, allowing properties to be written to Object.prototype. This issue is fixed in version 2.0.5.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-54737)\n\nAffected packages:\n\n- `@phun-ky/defaults-deep < 2.0.5`\n\nPatched in:\n\n- `@phun-ky/defaults-deep 2.0.5`\n\nSource: https://github.com/advisories/GHSA-mj3g-7xcc-x4vh","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":40.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}