Allocation of Resources Without Limits or Throttling in nest - #VU166176
Published: November 13, 2026
Vulnerability identifier: #VU166176
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service by exhausting heap memory and terminating the application process.
The vulnerability exists due to allocation of resources without aggregate limits in the Fastify adapter's multipart upload interceptors when parsing application/json fields into objects retained throughout a request. A remote attacker can send a multipart request containing excessive JSON field data within the default request limits to exhaust the heap and crash the process.
Affected software
nest
Remediation
Install security update from vendor's website.
nest - update to 12.5.0