CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2021-23518
Critical (9.8). EPSS 1.9% chance of exploitation in the next 30 days. Fixed in cached-path-relative 1.1.0.
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
Severity
- EPSS
- 1.9% chance of exploitation in the next 30 days; higher than 80% of CVEs (scores of 2026-10-31)
- CWE
- CWE-1321
- Published
- Modified
- Record from
- the NVD, synced
Affected
- cached-path-relative_project:cached-path-relative
- debian:debian_linux
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-wg6g-ppvx-927h | npm | cached-path-relative | <1.1.0 | 1.1.0 |
References
- https://github.com/ashaffer/cached-path-relative/commit/40c73bf70c58add5aec7d11e4f36b93d144bb760
- https://lists.debian.org/debian-lts-announce/2022/12/msg00006.html
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2348246
- https://snyk.io/vuln/SNYK-JS-CACHEDPATHRELATIVE-2342653
- https://github.com/ashaffer/cached-path-relative/commit/40c73bf70c58add5aec7d11e4f36b93d144bb760