CVE-2018-3721

unknown
Published 2018-07-26 · Modified 2025-08-12
CVSS v3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS v2
VIR risk

Description

lodash node module before 4.17.5 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability via defaultsDeep, merge, and mergeWith functions, which allows a malicious user to modify the prototype of "Object" via __proto__, causing the addition or modification of an existing property that will exist on all objects.

Predictions

Exploit likelihood
30%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2018-3721

OS impact

OSVersionStatusFixed in
debian debianbookwormfixed4.17.11+dfsg-1
debian debianbullseyefixed4.17.11+dfsg-1
debian debianforkyfixed4.17.11+dfsg-1
debian debiansidfixed4.17.11+dfsg-1
debian debiantrixiefixed4.17.11+dfsg-1

Package impact

EcosystemPackageVulnerableFixed
ruby RubyGemslodash-rails<>= 4.17.5>= 4.17.5
npm npmlodash<4.17.54.17.5
ruby RubyGemslodash-rails<4.17.54.17.5

References

Verify integrity in audit chain (admin only). AS-IS.