GHSA-jfxm-w8g2-4rcv · Severity: high · Ecosystem: npm — Cisco node-jose improper validation of JWT signature
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.
Conclusion & alert: CVE-2018-0114 is rated High Exploit Risk (79.6/100): CVSS High severity, with high exploitation likelihood (EPSS 84.69%, 99th percentile). Core evidence: 2 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 44324 | exploit_db | edb | 2018-03-20 | Exploit-DB ↗ |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-05 | 84.88% | 84.69% | -0.19% |
| 2 | 2026-04-22 | 84.69% | 84.88% | +0.19% |
| 3 | 2026-01-29 | — | 84.69% | — |
Full EPSS history (26 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
GHSA-jfxm-w8g2-4rcv · Severity: high · Ecosystem: npm — Cisco node-jose improper validation of JWT signature
| URL | Tags |
|---|---|
| http://www.securityfocus.com/bid/102445 | Third Party Advisory VDB Entry |
| https://github.com/cisco/node-jose/blob/master/CHANGELOG.md | Release Notes Third Party Advisory |
| https://github.com/zi0Black/POC-CVE-2018-0114 | Exploit Third Party Advisory |
| https://tools.cisco.com/security/center/viewAlert.x?alertId=56326 | Patch Vendor Advisory |
| https://www.exploit-db.com/exploits/44324/ | Third Party Advisory VDB Entry |