Memory exhaustion in Go net/url query parameter parsing
CVE-2025-61726 affects Go's standard library, specifically net/url and code paths that use net/http.Request.ParseForm. The net/url package does not impose a limit on the number of query parameters parsed. Although URL query size is often indirectly constrained by request-header limits, ParseForm can also process large application/x-www-form-urlencoded bodies. An attacker can supply a large form or query string containing many distinct parameter names, causing the parser to allocate and retain excessive memory while building the parsed parameter map. The issue is a resource-consumption flaw that can be triggered through attacker-controlled HTTP input processed by affected Go applications.
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Denial-of-service (memory exhaustion) in Go net/http Request.ParseForm when parsing URL-encoded forms with very large numbers of key-value pairs, causing excessive allocations.
A denial-of-service vulnerability in Go’s net/http where Request.ParseForm can be forced into memory exhaustion via URL-encoded forms containing excessive key-value pairs.
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