critical
CVE-2021-23518
cached-path-relative: Prototype Pollution via the cache variable
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GHSA7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Red Hat8.6CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by GHSA (high), Red Hat (medium).
Description
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
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| debian 10 | node-cached-path-relative | 1.0.1-2+deb10u1 |
| debian 11 | node-cached-path-relative | 1.0.2-1+deb11u1 |
| debian 12 | node-cached-path-relative | 1.1.0+~1.0.0-1 |
| debian 13 | node-cached-path-relative | 1.1.0+~1.0.0-1 |
| debian 14 | node-cached-path-relative | 1.1.0+~1.0.0-1 |
| echo | node-cached-path-relative | 1.1.0+~1.0.0-1 |
| npm::GitHub Security Advisory npm | cached-path-relative | 1.1.0 |
References
- https://access.redhat.com/security/cve/CVE-2021-23518
- https://github.com/ashaffer/cached-path-relative
- https://github.com/ashaffer/cached-path-relative/commit/40c73bf70c58add5aec7d11e4f36b93d144bb760
- https://lists.debian.org/debian-lts-announce/2022/12/msg00006.html
- https://nvd.nist.gov/vuln/detail/CVE-2021-23518
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2348246
- https://snyk.io/vuln/SNYK-JS-CACHEDPATHRELATIVE-2342653
- https://www.cve.org/CVERecord?id=CVE-2021-23518