Allocation of Resources Without Limits or Throttling Affecting std/net/http/internal package, versions <1.20.12>=1.21.0-0 <1.21.5
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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Start learning- Snyk IDSNYK-GOLANG-STDNETHTTPINTERNAL-14548521
- published6 Jan 2026
- disclosed6 Dec 2023
- creditBartek Nowotarski
Introduced: 6 Dec 2023
CVE-2023-39326 (opens in a new tab)How to fix?
Upgrade std/net/http/internal to version 1.20.12, 1.21.5 or higher.
Overview
std/net/http/internal is a Go standard library package std/net/http/internal
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling.
Go Vulnerability Report:
A malicious HTTP sender can use chunk extensions to cause a receiver reading from a request or response body to read many more bytes from the network than are in the body.A malicious HTTP client can further exploit this to cause a server to automatically read a large amount of data (up to about 1GiB) when a handler fails to read the entire body of a request.Chunk extensions are a little-used HTTP feature which permit including additional metadata in a request or response body sent using the chunked encoding. The net/http chunked encoding reader discards this metadata. A sender can exploit this by inserting a large metadata segment with each byte transferred. The chunk reader now produces an error if the ratio of real body to encoded bytes grows too small.