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.
- CVSS
- 7.5High
- Exploited in the wild
- Not knownPublic exploit code; not in CISA KEV
- EPSS
- 42.7%chance of exploitation in the next 30 daystop 2% of scored CVEsFIRST score of 11 Nov 2026
- Fix
- Patch availablesee the advisories in the references
- Published
- 4 Jan 2018analysed here 12 Nov 2026
Summary
Triage
The summary, impact and action text on this page are written by our AI analysis pipeline, or taken from the NVD description when a CVE was imported from NVD. They are not the vendor's wording: check them against the sources. A longer AI executive summary and technical analysis are generated for signed-in accounts on the Max plan.
Affected products
| Product | Affected versions | Vendor says fixed in |
|---|---|---|
| Node-jose Library | Node-jose LibraryVendor says fixed in: not stated |
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.
Products named in our analysis
- cisco:node-jose
Fix and mitigation
WAF and other mitigations
Can a WAF block it? Partly. The bug can be reached over the network, so generic WAF rules may stop some attacks. Its weakness type is unknown, so we cannot be more precise.
Also consider: patch
Based on the weakness type only; no CVE-specific evidence yet. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.
Remediation steps (AI-written)
Step-by-step remediation is generated for accounts on the Max plan, for CVEs that match a technology in their stack. Add this technology to your stack to see the fix checklist.
Exploitation evidence
- CISA KEV catalog
- Not listed as of our last sync.
- Public exploit code
- Yes: 1 on Exploit-DB · 14 GitHub proofs of concept
- CISA SSVC
- exploitation poc, automatable yes, technical impact partialAssessed by CISA 2 Dec 2024 (SSVC 2.0.3). Exploitation is none, poc (public proof of concept) or active.
Exploit-DB
- Cisco node-jos < 0.11.0 - Re-sign Tokenswebapps, 20 Mar 2018
GitHub proofs of concept
- z-bool/Venom-JWT288 stars
- zi0Black/POC-CVE-2018-011426 stars
- j4k0m/CVE-2018-01144 stars
- scumdestroy/CVE-2018-01143 stars
and 10 more repositories
Listed so you can judge urgency, not as a recommendation to run anything. GitHub “proofs of concept” are unvetted: some are fake or carry malware. Exploit-DB marks the entries its staff verified.
Timeline
- 4 Jan 2018Published
- 20 Mar 2018First public exploit or proof of concept75 days (about 3 months) later
- 2 Dec 2024CISA SSVC assessment: exploitation poc2,450 days (about 7 years) later
- 2 Dec 2024CVE record last updatedsame day later
- 12 Nov 2026Analysed by vulneraibility.com710 days (about 2 years) later
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
| Metric | Value | What it means |
|---|---|---|
| Attack vector | NetworkReachable over the internet or any routable network. | Reachable over the internet or any routable network. |
| Attack complexity | LowRepeatable attack, no special conditions. | Repeatable attack, no special conditions. |
| Privileges required | NoneThe attacker needs no prior access. | The attacker needs no prior access. |
| User interaction | NoneNo victim action needed. | No victim action needed. |
| Scope | UnchangedImpact stays within the vulnerable component. | Impact stays within the vulnerable component. |
| Confidentiality | NoneNo data disclosure. | No data disclosure. |
| Integrity | HighComplete modification possible. | Complete modification possible. |
| Availability | NoneThe service stays up. | The service stays up. |
Common questions
Is CVE-2018-0114 being exploited?
Not confirmed. CVE-2018-0114 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 43% probability of exploitation in the next 30 days.
How severe is CVE-2018-0114?
CVE-2018-0114 is rated High with a CVSS score of 7.5. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2018-0114?
Yes. A fix has been recorded for CVE-2018-0114. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2018-0114 affect?
CVE-2018-0114 affects cisco:node-jose. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
References
5 references in the CVE record, grouped by the tags the record gives them.
Exploits (1)
- exploit-db.com /exploits/44324/
Other links (4)
- tools.cisco.com /security/center/viewAlert.x?alertId=56326
- github.com /zi0Black/POC-CVE-2018-0114
- github.com /cisco/node-jose/blob/master/CHANGELOG.md
- securityfocus.com /bid/102445
Where the data on this page comes from
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- Exploit-DB: published exploits
- PoC-in-GitHub: GitHub repositories that claim a proof of concept
Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.
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