CVE-2026-25679

7.5

HIGH CVSS 3.1

Incorrect parsing of IPv6 host literals in net/url

Overview

Description

url.Parse insufficiently validated the host/authority component and accepted some invalid URLs.

Details

INFO

Published Date :

March 6, 2026, 10:16 p.m.

Last Modified :

April 21, 2026, 2:43 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]

Impact

Affected Products

The following products are affected by CVE-2026-25679 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID	Vendor	Product	Action
1	Golang	go

: Total Affected Vendor : 1 | Products : 1

Scoring

CVSS Scores

The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.

Score	Version	Severity	Vector	Exploitability Score	Impact Score	Source
	CVSS 3.1	HIGH				134c704f-9b21-4f2e-91b3-4a467353bcc0

Solution

Update the library to validate URLs properly and prevent parsing invalid hosts.

Update the url.Parse library to the latest version.
Ensure host and authority components are validated.
Implement stricter URL validation rules.

Public PoC/Exploit Available at Github

CVE-2026-25679 has a 4 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-25679.

URL	Resource
https://go.dev/cl/752180	Mailing List
https://go.dev/issue/77578	Issue Tracking
https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk	Release Notes
https://pkg.go.dev/vuln/GO-2026-4601	Vendor Advisory

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-25679 is associated with the following CWEs:

CWE-425: Direct Request ('Forced Browsing')

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-25679 weaknesses.

CAPEC-87: Forceful Browsing Forceful Browsing CAPEC-127: Directory Indexing Directory Indexing CAPEC-143: Detect Unpublicized Web Pages Detect Unpublicized Web Pages CAPEC-144: Detect Unpublicized Web Services Detect Unpublicized Web Services CAPEC-668: Key Negotiation of Bluetooth Attack (KNOB) Key Negotiation of Bluetooth Attack (KNOB)

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

felegy/ubuntu-inmutable

None

Dockerfile C# Batchfile PowerShell Shell

Updated: 2 weeks ago

0 stars 0 fork 0 watcher

Born at : April 9, 2026, 9:13 a.m. This repo has been linked 1 different CVEs too.

ralvares/rhacs-vex

None

Python HTML

Updated: 2 weeks, 3 days ago

0 stars 0 fork 0 watcher

Born at : April 2, 2026, 4:58 a.m. This repo has been linked 8 different CVEs too.

Cod-e-Codes/marchat

Terminal chat for developers: Go WebSocket server + Bubble Tea TUI client, optional E2E, reactions, DMs, channels, plugins, files, code snippets, admin UI. Backends: SQLite, PostgreSQL, or MySQL. Self-hosted.

go golang admin-panel code-snippets plugins direct-message e2e file-share messaging

Go Dockerfile Shell PowerShell HTML

Updated: 2 weeks, 6 days ago

125 stars 9 fork 9 watcher

Born at : July 16, 2025, 3:48 p.m. This repo has been linked 3 different CVEs too.

runwhen-contrib/helm-charts

All Public RunWhen Helm Charts - Managed by terraform

Shell Dockerfile Go Template

Updated: 2 weeks, 6 days ago

1 stars 0 fork 0 watcher

Born at : Sept. 18, 2023, 10:09 a.m. This repo has been linked 98 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-25679 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-25679 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

Initial Analysis by [email protected]

Apr. 21, 2026

Action	Type	New Value
Added	CWE	CWE-425
Added	CPE Configuration	OR cpe:2.3:a:golang:go::::::::* versions up to (excluding) 1.25.8 cpe:2.3:a:golang:go:1.26.0:::::::
Added	Reference Type	Go Project: https://go.dev/cl/752180 Types: Mailing List
Added	Reference Type	Go Project: https://go.dev/issue/77578 Types: Issue Tracking
Added	Reference Type	Go Project: https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk Types: Release Notes
Added	Reference Type	Go Project: https://pkg.go.dev/vuln/GO-2026-4601 Types: Vendor Advisory

CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

Mar. 10, 2026

Action	Type	Old Value	New Value
Added	CVSS V3.1		AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

New CVE Received by [email protected]

Mar. 06, 2026

Action	Type	New Value
Added	Description	url.Parse insufficiently validated the host/authority component and accepted some invalid URLs.
Added	Reference	https://go.dev/cl/752180
Added	Reference	https://go.dev/issue/77578
Added	Reference	https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk
Added	Reference	https://pkg.go.dev/vuln/GO-2026-4601

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.