Prototype pollution in flattenizer
Priority MEDIUM 48CWE-1321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
Prototype pollution vulnerability in 'flattenizer' versions 0.0.5 through 1.0.5 allows an attacker to cause a denial of service and may lead to remote code execution.
Why it matters now
EPSS 0.03106 87th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed flattenizer (npm): 1.1.1
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 |
|---|---|---|---|---|---|
| — | flattenizer | 0.0.5, 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5 | — | No fix listed | CNA |
| — | flattenizer (npm) | 0.0.5 to before 1.1.1 | 1.1.1 | Patch available | GHSA-vq33-26pr-r4h6 |
- flattenizer Vendor— Affected 0.0.5, 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5 Fixed in — No fix listed CNA
- flattenizer (npm) Vendor— Affected 0.0.5 to before 1.1.1 Fixed in 1.1.1 Patch available GHSA-vq33-26pr-r4h6
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:flattenizer_project:flattenizer:*:*:*:*:*:node.js:*:* | 0.0.5 – 1.0.5 | Vulnerable | Flattenizer Project |
- cpe:2.3:a:flattenizer_project:flattenizer:*:*:*:*:*:node.js:*:* Versions 0.0.5 – 1.0.5 Vulnerable ·Flattenizer Project
Remediation
- Fix · GHSA-vq33-26pr-r4h6 flattenizer (npm) Fixed in 1.1.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2020-28279
- 2026-10-03 Alias added: GHSA-vq33-26pr-r4h6
References
Advisory 2
Sources
- CVE-2020-28279 · CVE Program
- CVE-2020-28279 · NVD
- FIRST EPSS
- GHSA-vq33-26pr-r4h6 · GitHub Advisory Database · CC BY 4.0
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