CVE-2023-37899

highpriority · track · 30EPSS 0.012 · 68 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.19% (68th) EPSS

CVSS 7.5 · high

Is it mine?

8 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

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

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

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · security-advisories@github.comexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-754USCWE-754US

affected products (8)

Products and version ranges known to be affected.

feathersjs feathers≤ < 4.5.18enisa_euvdEU
feathersjs feathers5.0.0, → 5.0.8enisa_euvdEU
feathersjs feathers< 4.5.18nvdUScpe:2.3:a:feathersjs:feathers:*:*:*:*:*:*:*:*
feathersjs feathers5.0.0 → 5.0.8nvdUScpe:2.3:a:feathersjs:feathers:*:*:*:*:*:*:*:*
npm @feathersjs/socketio< 4.5.18osvUSpkg:npm/%40feathersjs/socketio
npm @feathersjs/socketio5.0.0 → 5.0.8osvUSpkg:npm/%40feathersjs/socketio
npm @feathersjs/transport-commons< 4.5.18osvUSpkg:npm/%40feathersjs/transport-commons
npm @feathersjs/transport-commons5.0.0 → 5.0.8osvUSpkg:npm/%40feathersjs/transport-commons

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-hhr9-rh25-hvf9Feathers socket handler allows abusing implicit toString2023-07-20ghsa · osvUS
### Impact Feathers socket handler did not catch invalid string conversion errors like: ```ts const message = `${{ toString: '' }}` ``` Causing the NodeJS process to crash when sending an unexpected Socket.io message like ```ts socket.emit('find', { toString: '' }) ``` ### Patches A fix has been released in - `v5.0.8` via #3241 - `v4.5.18` via #3242 ### Workarounds Since it is in the core Socket handling code upgrading to the latest version is necessary. ### References - [v5.0.8 Changelog](https://github.com/feathersjs/feathers/blob/dove/CHANGELOG.md#508-2023-07-19) - [v4.5.18 Changelog](https://github.com/feathersjs/feathers/blob/crow/CHANGELOG.md#4518-2023-07-19)

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 2023-07-19modified 2026-06-17

references (16)

External citations — patches, advisories, analysis.

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