{"id":"CVE-2018-0114","aliases":["GHSA-jfxm-w8g2-4rcv"],"url":"https://o3.security/vulnerability/CVE-2018-0114","summary":"Cisco node-jose improper validation of JWT signature","details":"A vulnerability in the Cisco node-jose open source library before 0.11.0 could allow an unauthenticated, remote attacker to re-sign tokens using a key that is embedded within the token. The vulnerability is due to node-jose following the JSON Web Signature (JWS) standard for JSON Web Tokens (JWTs). This standard specifies that a JSON Web Key (JWK) representing a public key can be embedded within the header of a JWS. This public key is then trusted for verification. An attacker could exploit this by forging valid JWS objects by removing the original signature, adding a new public key to the header, and then signing the object using the (attacker-owned) private key associated with the public key embedded in that JWS header.","published":"2018-01-04T06:29:00.417Z","modified":"2026-07-08T16:54:42.384467Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":11,"affectedPackages":[{"ecosystem":"npm","name":"node-jose","fixedVersion":"0.11.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/102445"},{"type":"ADVISORY","url":"https://github.com/cisco/node-jose/blob/master/CHANGELOG.md"},{"type":"ADVISORY","url":"https://www.exploit-db.com/exploits/44324/"},{"type":"FIX","url":"https://tools.cisco.com/security/center/viewAlert.x?alertId=56326"},{"type":"EVIDENCE","url":"https://github.com/zi0Black/POC-CVE-2018-0114"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T16:54:42.384467Z"}}