{"action":"Upgrade json-web-token to 4.0.0 or later.","affected":[{"fixed":"4.0.0","introduced":"0"}],"component":"json-web-token","cve_ids":["CVE-2023-48238"],"ecosystem":"npm","exploited":false,"fixed_versions":["4.0.0"],"ghsa_id":"GHSA-4xw9-cx39-r355","id":"tcs_01M5JJ2TF8JGXD5QJMQHRQSTW5","modified_at":"2026-10-19T20:00:04.713676565Z","published_at":"2023-11-17T22:48:15Z","references":["https://osv.dev/vulnerability/GHSA-4xw9-cx39-r355","https://github.com/joaquimserafim/json-web-token/security/advisories/GHSA-4xw9-cx39-r355","https://nvd.nist.gov/vuln/detail/CVE-2023-48238","https://github.com/joaquimserafim/json-web-token/commit/b6e56b1346f48432d29133c76b65222ad93956b7","https://github.com/joaquimserafim/json-web-token","https://github.com/joaquimserafim/json-web-token/blob/acf6a462471e1b14187eb77414e9161b8b7bff7e/index.js#L86"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-4xw9-cx39-r355","url":"https://osv.dev/vulnerability/GHSA-4xw9-cx39-r355"}],"summary":"json-web-token library is vulnerable to a JWT algorithm confusion attack"}