Allocation of Resources Without Limits or Throttling Affecting github.com/grpc/grpc-go/internal/envconfig package, versions <1.83.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published2 Sept 2026
- disclosed1 Sept 2026
- creditUnknown
Introduced: 1 Sep 2026
NewCVE-2026-84304 Â (opens in a new tab)How to fix?
Upgrade github.com/grpc/grpc-go/internal/envconfig to version 1.83.1 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the HTTP/2 DATA frame receive buffer handling, where each received fragment incurs per-fragment tracking and queue allocation overhead even while staying within the configured flow-control windows. An attacker can drive the process to an OutOfMemory condition or a runtime panic by opening gRPC streams and fragmenting payloads into millions of tiny HTTP/2 DATA frames, such as 1 byte each, across many concurrent multiplexed streams. This requires only the ability to establish gRPC stream connections to the server.