CVE-2026-40879

HIGH

7.5

Description

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/21/2026

Last Modified4/24/2026

Sourcenvd

Honeypot Sightings0

Affected Products

nestjs:nest

Weaknesses (CWE)

CWE-674

References

https://github.com/nestjs/nest/security/advisories/GHSA-hpwf-8g29-85qm(security-advisories@github.com)

IOC Correlations

No correlations recorded

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