# CVE-2026-67201

## Summary

- **CVE ID:** CVE-2026-67201
- **Severity:** HIGH
- **CVSS Score:** 8.6 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N)
- **CWE:** CWE-436
- **Published:** Jul 29, 2026
- **Last Modified:** Jul 29, 2026

## Description

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. Attackers can craft a URL containing a backslash in the authority section such that net.urllib.parse() extracts the trusted host for allowlist validation while net.http.get() normalizes the backslash and connects to the internal host, enabling access to internal network services that the allowlist was intended to block.

## Affected Products

- vlang — v (0)
- vlang — v (85859f0f3498d4091b38009c45ed390a97eeedc2)

## References

- [CNA](https://github.com/vlang/v/issues/27945)
- [CNA](https://github.com/vlang/v/pull/27947)
- [CNA](https://github.com/vlang/v/commit/85859f0f3498d4091b38009c45ed390a97eeedc2)
- [CNA](https://www.vulncheck.com/advisories/v-ssrf-bypass-via-parser-differential-in-net-urllib-and-net-http)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.39%
- **EPSS Percentile:** 32.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._