Prototype pollution in js-extend
Priority MEDIUM 47CWE-1321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Tampering
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-915.
Summary
Prototype pollution vulnerability in 'js-extend' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.
Why it matters now
EPSS 0.02961 87th 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
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | js-extend | 0.0.1, 0.0.2, 1.0.1 | — | No fix listed | CNA |
| — | js-extend (npm) | up to 1.0.1 | — | No fix listed | GHSA-mh82-55cm-6gfh |
- js-extend Vendor— Affected 0.0.1, 0.0.2, 1.0.1 Fixed in — No fix listed CNA
- js-extend (npm) Vendor— Affected up to 1.0.1 Fixed in — No fix listed GHSA-mh82-55cm-6gfh
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:js-extend_project:js-extend:*:*:*:*:*:node.js:*:* | 0.0.1 – 1.0.1 | Vulnerable | Js-extend Project |
- cpe:2.3:a:js-extend_project:js-extend:*:*:*:*:*:node.js:*:* Versions 0.0.1 – 1.0.1 Vulnerable ·Js-extend Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-25945
- 2026-10-03 Alias added: GHSA-mh82-55cm-6gfh
References
Sources
- CVE-2021-25945 · CVE Program
- CVE-2021-25945 · NVD
- FIRST EPSS
- GHSA-mh82-55cm-6gfh · GitHub Advisory Database · CC BY 4.0
- CVE-2021-25945 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences