What is CVE-2026-67201?

CVE-2026-67201 is a high-severity vulnerability in Vlang V, classified under CWE-436. CVSS score: 8.6/10. Published 2026-07-29.

How severe is CVE-2026-67201?

High severity. CVSS v3 base score is 8.6 out of 10.

Vulnerability in Vlang V

CVE-2026-67201

V through 0.5.2, fixed in commit 85859f0, contains a server-side request forgery (SSRF) bypass vulnerability that allows attackers to circumvent host-based allowlists by exploiting a parser differential between net.urllib and net.http. Att…

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.

Affected products

Vlang V — versions 0, 85859f0f3498d4091b38009c45ed390a97eeedc2

Weakness classification (CWE)

CWE-436

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-67201?: CVE-2026-67201 is a high-severity vulnerability in Vlang V, classified under CWE-436. CVSS score: 8.6/10. Published 2026-07-29.
How severe is CVE-2026-67201?: High severity. CVSS v3 base score is 8.6 out of 10.