CVE-2018-3728
hoek node module before 4.2.0 and 5.0.x before 5.0.3 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability via 'merge' and 'applyToDefaults' functions, which allows a malicious user to modify the prototype of "Object" via __proto__,…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.19%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
hoek node module before 4.2.0 and 5.0.x before 5.0.3 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability via 'merge' and 'applyToDefaults' 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 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 4.19% probability · 91th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-471
- Affected
- hapijs/hoek
- Source
- support@hackerone.com
EPSS 4.2% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/103108Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:1263Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1264Third Party Advisory
- https://github.com/hapijs/hoek/commit/32ed5c9413321fbc37da5ca81a7cbab693786deePatch, Third Party Advisory
- https://hackerone.com/reports/310439Exploit, Third Party Advisory
- https://nodesecurity.io/advisories/566Broken Link
- https://snyk.io/vuln/npm:hoek:20180212Exploit, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/103108Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:1263Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1264Third Party Advisory
- https://github.com/hapijs/hoek/commit/32ed5c9413321fbc37da5ca81a7cbab693786deePatch, Third Party Advisory
- https://hackerone.com/reports/310439Exploit, Third Party Advisory
- https://nodesecurity.io/advisories/566Broken Link
- https://snyk.io/vuln/npm:hoek:20180212Exploit, Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.