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Vulnerability record · CVE-2023-37899 · published 19 July 2023

CVE-2023-37899: Feathersjs feathers vulnerability

Feathersjs · Feathers

Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. Feathers socket handler did not catch invalid string conversion errors like `const message = ${{ toString: '' }}` which would cause the NodeJS process to crash when sending an unexpected Socket.io message like `socket.emit('find', { toString: '' })`. A fix has been released in versions 5.0.8 and 4.5.18. Users are advised to upgrade. There is no known workaround for this vulnerability.

7.5 CVSS 3.1 High EPSS 1.2% · top 33.4% CWE-754 · CWE-754
7.5CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. Feathers socket handler did not catch invalid string conversion errors like `const message = ${{ toString: '' }}` which would cause the NodeJS process to crash when sending an unexpected Socket.io message like `socket.emit('find', { toString: '' })`. A fix has been released in versions 5.0.8 and 4.5.18. Users are advised to upgrade. There is no known workaround for this vulnerability.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/feathersjs/feathers/blob/crow/CHANGELOG.md#4518-2023-07-19 Release Notes
https://github.com/feathersjs/feathers/blob/dove/CHANGELOG.md#508-2023-07-19 Release Notes
https://github.com/feathersjs/feathers/pull/3241 Patch
https://github.com/feathersjs/feathers/pull/3242 Patch
https://github.com/feathersjs/feathers/security/advisories/GHSA-hhr9-rh25-hvf9 ExploitVendor Advisory
https://github.com/feathersjs/feathers/blob/crow/CHANGELOG.md#4518-2023-07-19 Release Notes
https://github.com/feathersjs/feathers/blob/dove/CHANGELOG.md#508-2023-07-19 Release Notes
https://github.com/feathersjs/feathers/pull/3241 Patch
https://github.com/feathersjs/feathers/pull/3242 Patch
https://github.com/feathersjs/feathers/security/advisories/GHSA-hhr9-rh25-hvf9 ExploitVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2023-37899), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.