Prototype Pollution in Sails.js

published 2022-03-17 4 y ago modified 2026-06-17 4 mo ago also GHSA-8v3j-jfg3-v3fv , EUVD-2022-1385

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits: 0; none known

SailsJS Sails.js <=1.4.0 is vulnerable to Prototype Pollution via controller/load-action-modules.js, function loadActionModules().

Patch / fix

links 2

github.com/balderdashy/sails@7c5379a commit
github.com/balderdashy/sails/issues/7209 advisory

Exploit prediction

1.83% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/balderdashy/sails/issues/7209 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	sails	<=1.5.2	no fix listed

Classification

Weakness

CWE-1321 Improperly Controlled Modification of Object Prototype Attributes

References

github.com /balderdashy/sails/issues/7209
web, exploit, issue-tracking, patch, third-party-advisory
github.com /balderdashy/sails/commit/7c5379a656bb305c958df1dcc2b51a9668830358
web
github.com /Marynk/JavaScript-vulnerability-detection/blob/main/sailsJS%20PoC.zip
web, broken-link
github.com /balderdashy/sails/blob/master/lib/app/private/controller/load-action-modules.js#L32
web, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2021-44908
advisory
github.com /balderdashy/sails
package

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.

Summary