Information Exposure Affecting std/net/http/httputil package, versions <1.25.10>=1.26.0-0 <1.26.3
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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- published8 May 2026
- disclosed7 May 2026
- creditUnknown
Introduced: 7 May 2026
NewCVE-2026-39825 (opens in a new tab)How to fix?
Upgrade std/net/http/httputil to version 1.25.10, 1.26.3 or higher.
Overview
std/net/http/httputil is a Go standard library package std/net/http/httputil
Affected versions of this package are vulnerable to Information Exposure.
Go Vulnerability Report:
ReverseProxy can forward queries containing parameters not visible to Rewrite functions. When used with a Rewrite function, or a Director function which parses query parameters, ReverseProxy sanitizes the forwarded request to remove query parameters which are not parsed by url.ParseQuery. ReverseProxy does not take ParseQuery's limit on the total number of query parameters (controlled by GODEBUG=urlmaxqueryparams=N) into account. This can permit ReverseProxy to forward a request containing a query parameter that is not visible to the Rewrite function. For example, the query "a1=x&a2=x&...&a10000=x&hidden=y" can forward the parameter "hidden=y" while hiding it from the proxy's Rewrite function.