ReverseProxy forwards queries with more than urlmaxqueryparams parameters in net/http/httputil

TRUNG BÌNH 5.3CVE-2026-39825 · BIT-golang-2026-39825 · GO-2026-4976 · Công bố 07/05/2026 · cập nhật 26/10/2026

Tóm tắt nhanh

CVE-2026-39825 là lỗ hổng mức TRUNG BÌNH (CVSS 5.3) ảnh hưởng stdlib, go (golang).
Xác suất bị khai thác trong 30 ngày tới (EPSS): 0.39%, cao hơn 33.2% các lỗ hổng khác.
Cách xử lý: cập nhật lên 1.26.3, 1.25.10 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
stdlib Go	`≥ 1.26.0-0, < 1.26.3< 1.25.10`	`1.26.31.25.10`
go golang	`≥ 1.26.0, < 1.26.3< 1.25.10`	`1.26.31.25.10`

Mô tả

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.

Mô tả của NVD

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.