CVE-2026-67201

vlang · v

An interpretation conflict vulnerability in the V programming language, specifically within the net/urllib and net/http modules, allows for SSRF bypass.

Executive summary

A high-severity interpretation conflict vulnerability in the V programming language could allow attackers to bypass SSRF protections, posing a significant risk to network security.

Vulnerability

This is an interpretation conflict (CWE-436) that affects how the parser handles network requests. The vulnerability is unauthenticated and allows an attacker to bypass server-side request forgery (SSRF) protections.

Business impact

The CVSS score of 8.6 highlights the potential for severe impact, particularly in environments where V is used to build web applications or network utilities. Successful exploitation can lead to unauthorized access to internal resources or services that are otherwise protected from the public internet.

Remediation

Immediate Action: Update the V compiler to the version containing the fix, identified by commit 85859f0f3498d4091b38009c45ed390a97eeedc2.

Proactive Monitoring: Review application logs for unexpected outbound requests or abnormal traffic patterns originating from services built with the affected versions of V.

Compensating Controls: Deploy Web Application Firewalls (WAF) to inspect and filter incoming requests for patterns associated with SSRF exploitation.

Exploitation status

Public Exploit Available: Unknown.

Analyst recommendation

Developers and security teams should immediately transition to the patched version of the V language. Verify that all dependencies and compiled applications are rebuilt using the updated compiler to ensure the fix is effectively implemented.