CVE-2021-44908Public exploitNetwork attack vector

Prototype pollution via unsanitized file path

Published Mar 17, 2022 · Updated Aug 4, 2024

Prototype pollution in SailsJS Sails.js 1.4.0 and earlier allows remote attackers to alter object prototypes via controller file paths. The loadActionModules() function assigns properties derived from dynamically controlled filePath values without sanitizing prototype-sensitive names. Remote exploitation requires an application that lets untrusted input control action-file paths; documented consequences include property injection and denial of service.

CVSS severity9.8
Critical
EPSS probability1.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Prototype pollution in SailsJS Sails.js 1.4.0 and earlier allows remote attackers to alter object prototypes via controller file paths. The loadActionModules() function assigns properties derived from dynamically controlled filePath values without sanitizing prototype-sensitive names. Remote exploitation requires an application that lets untrusted input control action-file paths; documented consequences include property injection and denial of service.

The record

CVE
CVE-2021-44908
Published
Mar 17, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1321, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 17, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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