{"id":"CVE-2023-37899","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-37899","generatedAt":"2026-10-28T01:13:37.693Z","title":"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: '' })`.","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.","published":"2023-07-19T20:15:11.000Z","lastModified":"2026-06-17T06:08:52.000Z","status":"Modified","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-754"],"affected":["feathersjs/feathers"],"epss":{"score":0.01188,"percentile":0.67689,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.19%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/feathersjs/feathers/blob/crow/CHANGELOG.md#4518-2023-07-19","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/feathersjs/feathers/blob/dove/CHANGELOG.md#508-2023-07-19","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/feathersjs/feathers/pull/3241","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/feathersjs/feathers/pull/3242","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/feathersjs/feathers/security/advisories/GHSA-hhr9-rh25-hvf9","tags":["Exploit","Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/feathersjs/feathers/blob/crow/CHANGELOG.md#4518-2023-07-19","tags":["Release Notes"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/feathersjs/feathers/blob/dove/CHANGELOG.md#508-2023-07-19","tags":["Release Notes"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/feathersjs/feathers/pull/3241","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/feathersjs/feathers/pull/3242","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/feathersjs/feathers/security/advisories/GHSA-hhr9-rh25-hvf9","tags":["Exploit","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-37899","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}