Excessive Memory Consumption in net/url Package in Go by Google
CVE-2025-61726

7.5HIGH

Key Information:

Vendor

Go Standard Library

Status
Net/url
Vendor
CVE Published:
28 January 2026

What is CVE-2025-61726?

The net/url package in Go lacks a limit on the number of query parameters that can be processed, which can lead to significant memory consumption when parsing large URL-encoded forms. Although the maximum request header size typically constrains the overall size of query parameters, the net/http.Request.ParseForm method can still handle forms with many unique parameters. This issue may result in performance degradation and resource exhaustion.

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Affected Version(s)

net/url 0 < 1.24.12

net/url 1.25.0 < 1.25.6

References

https://go.dev/cl/736712
https://go.dev/issue/77101
https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

jub0bs
JSON
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