fastest-json-copy 1.0.1 - Prototype Pollution
Priority MEDIUM 63CWE-1321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub.
Summary
fastest-json-copy version 1.0.1 allows an external attacker to edit or add new properties to an object. This is possible because the application does not correctly validate the incoming JSON keys, thus allowing the '__proto__' property to be edited.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00725 54th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | fastest-json-copy | 1.0.1 | — | No fix listed | CNA |
| — | fastest-json-copy (npm) | up to 1.0.1 | — | No fix listed | GHSA-p5g9-rjcf-95vj |
- fastest-json-copy Vendor— Affected 1.0.1 Fixed in — No fix listed CNA
- fastest-json-copy (npm) Vendor— Affected up to 1.0.1 Fixed in — No fix listed GHSA-p5g9-rjcf-95vj
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:fastest-json-copy_project:fastest-json-copy:1.0.1:*:*:*:*:node.js:*:* | 1.0.1 | Vulnerable | Fastest-json-copy Project |
- cpe:2.3:a:fastest-json-copy_project:fastest-json-copy:1.0.1:*:*:*:*:node.js:*:* Versions 1.0.1 Vulnerable ·Fastest-json-copy Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2022-41714
- 2026-10-03 Alias added: GHSA-p5g9-rjcf-95vj
- 2026-10-09 EPSS moved to the 50th–90th percentile
References
Sources
- CVE-2022-41714 · CVE Program
- CVE-2022-41714 · NVD
- FIRST EPSS
- GHSA-p5g9-rjcf-95vj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences