GHSA-hpwf-8g29-85qm · Severity: high · Ecosystem: npm — Nest Affected by DoS via Recursive handleData in JsonSocket (TCP Transport)
Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.19, when an attacker sends many small, valid JSON messages in one TCP frame, handleData() recurses once per message; the buffer shrinks each call. maxBufferSize is never reached; call stack overflows instead. A ~47 KB payload is sufficient to trigger RangeError. This vulnerability is fixed in 11.1.19.
Conclusion & alert: CVE-2026-40879 is rated Low Risk (38.8/100): CVSS High severity, with low exploitation likelihood (EPSS 0.33%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.06% | 0.33% | +0.27% |
| 2 | 2026-04-27 | 0.04% | 0.06% | +0.02% |
| 3 | 2026-04-22 | — | 0.04% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
GHSA-hpwf-8g29-85qm · Severity: high · Ecosystem: npm — Nest Affected by DoS via Recursive handleData in JsonSocket (TCP Transport)
| URL | Tags |
|---|---|
| https://github.com/nestjs/nest/security/advisories/GHSA-hpwf-8g29-85qm | Vendor Advisory |