CVE-2018-3721

mediumpriority · track · 27EPSS 0.023 · 84 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.35% (84th) EPSS

CVSS 4 · medium

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-22

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04mediumAV:N/AC:L/Au:S/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nsecondary · OSV

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1321USprimaryCWE-1321USCWE-471USCWE-471US

affected products (6)

Products and version ranges known to be affected.

HackerOne lodash node module≤ Versions before 4.17.5enisa_euvdEU
lodash lodash< 4.17.5nvdUScpe:2.3:a:lodash:lodash:*:*:*:*:*:*:*:*
netapp active iq unified managerall versionsnvdUScpe:2.3:a:netapp:active_iq_unified_manager:*:*:*:*:*:*:*:*
netapp system manager= 9.0nvdUScpe:2.3:a:netapp:system_manager:*:*:*:*:*:*:*:*
RubyGems lodash-rails< 4.17.5osvUSpkg:gem/lodash-rails
npm lodash< 4.17.5osvUSpkg:npm/lodash

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-fvqr-27wr-82fmPrototype Pollution in lodash2018-07-26ghsa · osvUS
Versions of `lodash` before 4.17.5 are vulnerable to prototype pollution. The vulnerable functions are 'defaultsDeep', 'merge', and 'mergeWith' which allow 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. ## Recommendation Update to version 4.17.5 or later.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2018-06-07modified 2026-06-17

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+702 more

references (19)

External citations — patches, advisories, analysis.

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