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Allocation of Resources Without Limits or Throttling in io.netty:netty-codec-http3

CVE-2026-42582

  • io.netty:netty-codec-http3
High
7.5/10

Summary

When Netty decodes HTTP/3 headers, it sometimes runs `new byte[length]` using a length from the wire before checking that many bytes are really there. A small malicious header can claim a huge length (on the order of a gigabyte). Affected versions are prior to 4.2.13.Final.

  • 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