{"id":"CVE-2026-2950","summary":"lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`","details":"Impact:\n\nLodash versions 4.17.23 and earlier are vulnerable to prototype pollution in the _.unset and _.omit functions. The fix for (CVE-2025-13465: https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg) only guards against string key members, so an attacker can bypass the check by passing array-wrapped path segments. This allows deletion of properties from built-in prototypes such as Object.prototype, Number.prototype, and String.prototype.\n\nThe issue permits deletion of prototype properties but does not allow overwriting their original behavior.\n\nPatches:\n\nThis issue is patched in 4.18.0.\n\nWorkarounds:\n\nNone. Upgrade to the patched version.","aliases":["CVE-2025-13465","GHSA-f23m-r3pf-42rh","GHSA-xxjr-mmjv-4gpg"],"modified":"2026-07-15T01:49:11.928412965Z","published":"2026-03-31T19:18:35.796Z","related":["CGA-w8p3-8q8v-32x5"],"database_specific":{"cna_assigner":"openjs","cwe_ids":["CWE-1321"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2950.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2950.json"},{"type":"ADVISORY","url":"https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2950"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/lodash/lodash","events":[{"introduced":"d35a9c40beb594d09814ba7f7673b81d4d67a816"},{"fixed":"835a537f36ee2fd5fb7f524e213ff9ba2d8698f8"}],"database_specific":{"cpe":["cpe:2.3:a:lodash:lodash:*:*:*:*:*:node.js:*:*","cpe:2.3:a:lodash:lodash-amd:*:*:*:*:*:node.js:*:*","cpe:2.3:a:lodash:lodash-es:*:*:*:*:*:node.js:*:*"],"extracted_events":[{"introduced":"4.0.0"},{"fixed":"4.17.23"}],"source":"CPE_RANGE"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-2950.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L"}]}