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Allocation of Resources Without Limits or Throttling

CVE-2026-22036

High
7.5/10

Summary

Undici is an HTTP/1.1 client for Node.js. In Undici versions prior to 6.23.0 and 7.x prior to 7.18.2, the number of links in the decompression chain is unbounded and the default "maxHeaderSize" allows a malicious server to insert thousands compression steps leading to high CPU usage and excessive memory allocation. This vulnerability is fixed in 7.18.2 and 6.23.0.

  • LOW
  • NETWORK
  • NONE
  • UNCHANGED
  • NONE
  • NONE
  • NONE
  • HIGH

CWE-770 - Allocation of Resources Without Limits or Throttling

The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.

References

Advisory Timeline

  • Published