Description
The net/url package does not set a limit on the number of query parameters in a query. While the maximum size of query parameters in URLs is generally limited by the maximum request header size, the net/http.Request.ParseForm method can parse large URL-encoded forms. Parsing a large form containing many unique query parameters can cause excessive memory consumption.
References (4)
Core 4
Core References
Patch
https://go.dev/cl/736712
Release Notes, Mailing List
https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc
Vendor Advisory
https://pkg.go.dev/vuln/GO-2026-4341
Scores
CVSS v3
7.5
EPSS
0.0079
EPSS Percentile
51.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (1)
golang/go
< 1.24.12
Published
Jan 28, 2026
Tracked Since
Feb 18, 2026