Prototype Pollution in cached-path-relative

緊急 9.8CVE-2021-23518 · GHSA-wg6g-ppvx-927h · 21/01/2022 公開 · 17/06/2026 更新

要点

CVE-2021-23518 は cached-path-relative (cached-path-relative project), cached-path-relative に影響する深刻度「緊急」 (CVSS 9.8) の脆弱性です。
今後30日間に悪用される確率（EPSS）：1.9%（全脆弱性の 80.2% より高い）。
対処：1.1.0 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
cached-path-relative cached-path-relative_project	`< 1.1.0`	`1.1.0`
cached-path-relative npm	`< 1.1.0`	`1.1.0`

概要

The package cached-path-relative before 1.1.0 is vulnerable to Prototype Pollution via the cache variable that is set as {} instead of Object.create(null) in the cachedPathRelative function, which allows access to the parent prototype properties when the object is used to create the cached relative path. When using the origin path as proto, the attribute of the object is accessed instead of a path. Note: This vulnerability derives from an incomplete fix in https://security.snyk.io/vuln/SNYK-JS-CACHEDPATHRELATIVE-72573

NVD の説明

The package cached-path-relative before 1.1.0 are vulnerable to Prototype Pollution via the cache variable that is set as {} instead of Object.create(null) in the cachedPathRelative function, which allows access to the parent prototype properties when the object is used to create the cached relative path. When using the origin path as __proto__, the attribute of the object is accessed instead of a path. **Note:** This vulnerability derives from an incomplete fix in https://security.snyk.io/vuln/SNYK-JS-CACHEDPATHRELATIVE-72573