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Improper Validation of Array Index

CVE-2026-84445

High
8.7/10

Summary

A vulnerability exists in gRPC-Go servers configured with `xds.NewGRPCServer()` where a crafted request missing both `:authority` and `Host` headers can cause a server panic, resulting in a Denial of Service (DoS). All versions prior to 1.82.2 and 1.83.0 prior to 1.83.2 are affected.

  • LOW
  • NETWORK
  • NONE
  • NONE

CWE-129 - Improper Validation of Array Index

The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.

References

Advisory Timeline

  • Published