HTTP Request Smuggling Affecting std/net/http package, versions <1.4.3
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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Test your applications- Snyk IDSNYK-GOLANG-STDNETHTTP-14548602
- published6 Jan 2026
- disclosed5 Jan 2022
- creditJed Denlea, Régis Leroy
Introduced: 5 Jan 2022
CVE-2015-5739 (opens in a new tab)How to fix?
Upgrade std/net/http to version 1.4.3 or higher.
Overview
std/net/http is a Go standard library package std/net/http
Affected versions of this package are vulnerable to HTTP Request Smuggling.
Go Vulnerability Report:
HTTP headers were not properly parsed, which allows remote attackers to conduct HTTP request smuggling attacks via a request that contains Content-Length and Transfer-Encoding header fields.