{"cve":"CVE-2021-23434","nvd":{"published":"2021-08-27T17:15:06.910","modified":"2026-06-17T03:38:45.380","status":"Modified","description":"This affects the package object-path before 0.11.6. A type confusion vulnerability can lead to a bypass of CVE-2020-15256 when the path components used in the path parameter are arrays. In particular, the condition currentPath === '__proto__' returns false if currentPath is ['__proto__']. This is because the === operator returns always false when the type of the operands is different.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","score":8.6},"cwes":["CWE-843"],"references":["https://github.com/mariocasciaro/object-path%230116","https://github.com/mariocasciaro/object-path/commit/7bdf4abefd102d16c163d633e8994ef154cab9eb","https://lists.debian.org/debian-lts-announce/2023/01/msg00031.html","https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1570423","https://snyk.io/vuln/SNYK-JS-OBJECTPATH-1569453"],"products":["debian:debian_linux","object-path_project:object-path"],"source":"nvd","synced_at":"2026-10-19T21:21:57.125947417+00:00"},"epss":{"cve":"CVE-2021-23434","score":0.01902,"percentile":0.79691,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-v39p-96qg-c8rf","url":"https://osv.dev/vulnerability/GHSA-v39p-96qg-c8rf","summary":"Prototype Pollution in object-path","modified":"2025-01-14T09:11:55.900225Z","packages":[{"ecosystem":"npm","name":"object-path","purl":"pkg:npm/object-path","ranges":["<0.11.6"],"fixed":["0.11.6"]}]}],"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."]}