Prototype pollution in flatnest
Priority MEDIUM 44CWE-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
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
All versions of the package flatnest are vulnerable to Prototype Pollution via the nest() function in the flatnest/nest.js file.
Why it matters now
EPSS 0.00892 59th 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 |
|---|---|---|---|---|---|
| — | flatnest | all versions | — | No fix listed | CNA |
| — | flatnest (npm) | up to 1.0.0 | — | No fix listed | GHSA-7px2-3c2p-q4v4 |
- flatnest Vendor— Affected all versions Fixed in — No fix listed CNA
- flatnest (npm) Vendor— Affected up to 1.0.0 Fixed in — No fix listed GHSA-7px2-3c2p-q4v4
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:flatnest_project:flatnest:*:*:*:*:*:node.js:*:* | all versions | Vulnerable | Flatnest Project |
- cpe:2.3:a:flatnest_project:flatnest:*:*:*:*:*:node.js:*:* Versions all versions Vulnerable ·Flatnest Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-26135
- 2026-10-03 Alias added: GHSA-7px2-3c2p-q4v4
References
Other 4
- https://github.com/brycebaril/node-flatnest/blob/b7d97ec64a04632378db87fcf3577bd51ac3ee39/nest.js%23L43
- https://github.com/brycebaril/node-flatnest/commit/27d569baf9d9d25677640edeaf2d13af165868d6
- https://github.com/brycebaril/node-flatnest
- https://github.com/brycebaril/node-flatnest/blob/b7d97ec64a04632378db87fcf3577bd51ac3ee39/nest.js#L43
Sources
- CVE-2023-26135 · CVE Program
- CVE-2023-26135 · NVD
- FIRST EPSS
- GHSA-7px2-3c2p-q4v4 · 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