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.
References
| Link | Resource |
|---|---|
| https://go.dev/cl/770541 | Patch |
| https://go.dev/issue/78948 | Issue Tracking |
| https://groups.google.com/g/golang-announce/c/qcCIEXso47M | Release Notes |
| https://pkg.go.dev/vuln/GO-2026-4976 | Vendor Advisory |
Configurations
History
13 May 2026, 16:58
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://go.dev/cl/770541 - Patch | |
| References | () https://go.dev/issue/78948 - Issue Tracking | |
| References | () https://groups.google.com/g/golang-announce/c/qcCIEXso47M - Release Notes | |
| References | () https://pkg.go.dev/vuln/GO-2026-4976 - Vendor Advisory | |
| First Time |
Golang
Golang go |
|
| CPE | cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* | |
| CWE | NVD-CWE-noinfo |
08 May 2026, 22:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.3 |
07 May 2026, 20:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-07 20:16
Updated : 2026-05-13 16:58
NVD link : CVE-2026-39825
Mitre link : CVE-2026-39825
CVE.ORG link : CVE-2026-39825
JSON object : View
Products Affected
golang
- go
CWE