{"id":"GHSA-f23m-r3pf-42rh","revision":"ffb341233545452ab350f906e0a3f8d0","records":[{"revision":"ffb341233545452ab350f906e0a3f8d0","observedAt":"2026-11-03T15:57:27.789+00:00","statement":{"source":"osv","id":"GHSA-f23m-r3pf-42rh","aliases":["CVE-2026-2950"],"title":"lodash vulnerable to prototype pollution via array-path bypass in `_.unset`, `_.omit`, and `_.pullAt","description":"### Impact\n\nThe `_.unset`, `_.omit`, and `_.pullAt` functions are vulnerable to prototype pollution. 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\n### Patches\n\nThe issue is patched from 4.18.0 to 4.18.1 depending on the package: `lodash`, `lodash-es`, and `lodash-amd` in 4.18.1, and the standalone `lodash.unset` and `lodash.omit` packages in 4.18.0.\n\n### Workarounds\n\nNone. Upgrade to the patched version.\n\n### References\n\n- [CVE-2025-13465 / GHSA-xxjr-mmjv-4gpg](https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg) (original fix that this bypasses)","state":0,"publishedAt":"2026-04-01T23:50:27+00:00","modifiedAt":"2026-11-03T15:45:08.4656108+00:00","affected":[{"ecosystem":"npm","name":"lodash","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"4.17.23"},{"kind":"fixed","version":"4.18.1"}]}],"versions":["4.17.23"],"rawVersionEvidence":null},{"ecosystem":"npm","name":"lodash-es","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"4.17.23"},{"kind":"fixed","version":"4.18.1"}]}],"versions":["4.17.23"],"rawVersionEvidence":null},{"ecosystem":"npm","name":"lodash-amd","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"4.17.23"},{"kind":"fixed","version":"4.18.1"}]}],"versions":["4.17.23"],"rawVersionEvidence":null},{"ecosystem":"npm","name":"lodash.unset","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"4.18.0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"lodash.omit","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"4.18.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/lodash/lodash/security/advisories/GHSA-f23m-r3pf-42rh","https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg","https://nvd.nist.gov/vuln/detail/CVE-2026-2950","https://github.com/lodash/lodash/commit/4f0e376589e1889e8993e212a5c9041112ad178e","https://github.com/lodash/lodash/commit/87e6676934f7b4450fad68c35f0325ba165b48f8","https://github.com/lodash/lodash/commit/bbcf0036d27ef936f175bf26e73e247994d8e1e4","https://github.com/lodash/lodash/commit/db27b6bb14b12a1451b20edf87dfe307b87a337d","https://github.com/lodash/lodash/commit/fe8d32eda854377349a4f922ab7655c8e5df9a0b","https://cna.openjsf.org/security-advisories.html","https://github.com/lodash/lodash","https://github.com/lodash/lodash/releases/tag/4.18.1"],"sourceUrl":"https://github.com/advisories/GHSA-f23m-r3pf-42rh","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-f23m-r3pf-42rh","identifiers":["GHSA-f23m-r3pf-42rh","CVE-2026-2950"]},"retained":false,"historicalAffected":[]}],"coverage":[]}