net-url up to 1.24.11/1.25.5 on Go Request Header resource consumption

Summaryinfo

A vulnerability described as problematic has been identified in net-url up to 1.24.11/1.25.5 on Go. This issue affects some unknown processing of the component Request Header Handler. Such manipulation leads to resource consumption. This vulnerability is uniquely identified as CVE-2025-61726. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in net-url up to 1.24.11/1.25.5 on Go and classified as problematic. Affected by this issue is an unknown code block of the component Request Header Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

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.

This vulnerability is handled as CVE-2025-61726 since 09/30/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 297011 (SUSE SLES15 Security Update : go1.25-openssl (SUSE-SU-2026:0297-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.24.12 or 1.25.6 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (297011) and CERT Bund (WID-SEC-2026-0129). Once again VulDB remains the best source for vulnerability data.

Affected

• Red Hat Enterprise Linux
• Red Hat OpenShift
• Splunk Splunk Enterprise
• Dell integrated Dell Remote Access Controller
• Red Hat Ansible Automation Platform
• Google Container-Optimized OS
• Amazon Linux 2
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• RESF Rocky Linux
• IBM App Connect Enterprise
• Red Hat OpenStack
• IBM DB2
• Golang Go
• Open Source CoreDNS
• IBM Business Automation Workflow

Productinfo

Name

• net-url

Version

• 1.24.0
• 1.24.1
• 1.24.2
• 1.24.3
• 1.24.4
• 1.24.5
• 1.24.6
• 1.24.7
• 1.24.8
• 1.24.9
• 1.24.10
• 1.24.11
• 1.25.0
• 1.25.1
• 1.25.2
• 1.25.3
• 1.25.4
• 1.25.5

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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