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Fencer Vulns
high 7.5

CVE-2018-16490 json

Prototype Pollution in mpath

published 2019-02-01 7 y ago modified 2026-06-17 4 mo ago also GHSA-h466-j336-74wx , EUVD-2019-0297

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

A prototype pollution vulnerability was found in module mpath <0.5.1 that allows an attacker to inject arbitrary properties onto Object.prototype.

Patch / fix

  • npm mpath 0.5.1
  • mpath_project mpath 0.5.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-16490 updated cvss 4.2

nodejs-mpath: prototype pollution in Object.prototype

  • Red Hat Mobile Application Platform 4 nodejs-mpath
    affected: no fix planned “Out of support scope”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.10% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/390860 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N
GitHub 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
npm mpath
<0.5.1
0.5.1

Affected products

  • HackerOne mpath

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component
  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.