Unknown · Reverseproxy · CVE-2026-39825
**Name of the Vulnerable Software and Affected Versions**
ReverseProxy (affected versions not specified)
**Description**
ReverseProxy can forward queries containing parameters that are not visible to Rewrite functions. When utilizing a Rewrite function or a Director function that parses query parameters, ReverseProxy sanitizes the forwarded request by removing parameters not parsed by `url.ParseQuery`. However, it fails to account for the total query parameter limit defined by `GODEBUG=urlmaxqueryparams=N`. This allows a request to forward a parameter, such as `hidden=y`, while keeping it hidden from the proxy's Rewrite function by exceeding the parameter limit with other entries.
**Recommendations**
At the moment, there is no information about a newer version that contains a fix for this vulnerability.