What’s Vulnerable › Vulnerabilities

CVE-2021-23419: Prototype Pollution

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-08-08 · updated 2026-06-17
• Weakness: CWE-1321

Description

This affects the package open-graph before 0.2.6. The function parse could be tricked into adding or modifying properties of Object.prototype using a __proto__ or constructor payload.

Affected products

• open-graph: before 0.2.6 — fixed in 0.2.6

How to fix

Upgrade to a fixed version: open-graph 0.2.6. Check the vendor advisory for mitigations.

References

• https://github.com/samholmes/node-open-graph/commit/a0cef507a90adaac7dbbe9c404f09a50bdefb348
• https://snyk.io/vuln/SNYK-JS-OPENGRAPH-1536747
• https://github.com/samholmes/node-open-graph/commit/a0cef507a90adaac7dbbe9c404f09a50bdefb348
• https://snyk.io/vuln/SNYK-JS-OPENGRAPH-1536747

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