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CRITICAL severity

CVE-2021-23419 — open-graph

CRITICALFix: samholmes/node-open-graph@a0cef50

CVE-2021-23419 is a critical-severity (CVSS 9.8) CWE-1321 vulnerability in open-graph. 1 public exploit reference exists, so weaponization risk is real. A fix is available for open-graph — see the affected versions and patch details below.

Prototype Pollution in open-graph

Also known asGHSA-g452-6rfc-vrvx
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.1%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs65th percentile — riskier than 65% of all scored CVEsHighest risk
0.00%0.54%1.08%1.61%0.4%1.1%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2021-23419 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

19other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
open-graphnpm
2Kdownloads / week

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 Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmopen-graphall versions0.2.6npm install open-graph@0.2.6

Affected Products

1 product · 1 configurations
Application
open-graphopen-graph_project
< 0.2.6
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

This affects the package open-graph before 0.2.6. The function parse cou…

snyk.ioNVDAug 2021

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for open-graph, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update open-graph to 0.2.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-23419 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

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CVE-2021-23419: open-graph — Fixed in 0.2.6