Is @nestjs/microservices affected by CVE-2026-40879?

npm @nestjs/microservices is affected in <11.1.19.

Is CVE-2026-40879 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

high

CVE-2026-40879

Q: Is CVE-2026-40879 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

npm · @nestjs/microservices

Summary

Nest Affected by DoS via Recursive handleData in JsonSocket (TCP Transport)

Severity: high
EPSS: 0.3% (p24)
Also known as: GHSA-hpwf-8g29-85qm
Published: 2026-04-14

References

https://github.com/nestjs/nest/security/advisories/GHSA-hpwf-8g29-85qm
https://nvd.nist.gov/vuln/detail/CVE-2026-40879
https://github.com/nestjs/nest

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.