What is CVE-2018-0114?

CVE-2018-0114 is a high-severity vulnerability in Cisco Node-Jose, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2018-01-04.

How severe is CVE-2018-0114?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2018-0114 known to be exploited?

44 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Cisco Node-Jose

CVE-2018-0114

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 2018-01-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.427 (98.7th percentile), scored 2026-09-28.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.427 · newest: 0.427 · change: 0.000

Affected products

Cisco Node-Jose
Node-Jose Library — versions Node-jose Library

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

Public proof-of-concept exploits

References

tools.cisco.com/security/center/viewAlert.x (Patch, Vendor Advisory)
github.com/zi0Black/POC-CVE-2018-0114 (Exploit, Third Party Advisory)
github.com/cisco/node-jose/blob/master/CHANGELOG.md (Third Party Advisory, Release Notes)
www.exploit-db.com/exploits/44324/ (VDB Entry, Third Party Advisory, exploit)
www.securityfocus.com/bid/102445 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-0114?: CVE-2018-0114 is a high-severity vulnerability in Cisco Node-Jose, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2018-01-04.
How severe is CVE-2018-0114?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2018-0114 known to be exploited?: 44 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.