What’s Vulnerable › Vulnerabilities

CVE-2020-15256: Prototype pollution in object-path

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-10-19 · updated 2026-06-17
• Weakness: CWE-20

Description

A prototype pollution vulnerability has been found in `object-path` <= 0.11.4 affecting the `set()` method. The vulnerability is limited to the `includeInheritedProps` mode (if version >= 0.11.0 is used), which has to be explicitly enabled by creating a new instance of `object-path` and setting the option `includeInheritedProps: true`, or by using the default `withInheritedProps` instance. The default operating mode is not affected by the vulnerability if version >= 0.11.0 is used. Any usage of `set()` in versions < 0.11.0 is vulnerable. The issue is fixed in object-path version 0.11.5 As a workaround, don't use the `includeInheritedProps: true` options or the `withInheritedProps` instance if using a version >= 0.11.0.

Affected products

• mariocasciaro object-path: before 0.11.5 — fixed in 0.11.5

How to fix

Upgrade to a fixed version: mariocasciaro object-path 0.11.5. Check the vendor advisory for mitigations.

References

• https://github.com/mariocasciaro/object-path/commit/2be3354c6c46215c7635eb1b76d80f1319403c68
• https://github.com/mariocasciaro/object-path/security/advisories/GHSA-cwx2-736x-mf6w
• https://github.com/mariocasciaro/object-path/commit/2be3354c6c46215c7635eb1b76d80f1319403c68
• https://github.com/mariocasciaro/object-path/security/advisories/GHSA-cwx2-736x-mf6w

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