CVE-2026-82509 V Programming Language net.http TLS Certificate Validation Bypass
CriticalCVSS 9.1
- Published
- Updated
- Exploit status
- No public exploit known
Description
V programming language standard library net.http through version 0.5.2 prior to commit 4077484 contains a TLS certificate validation bypass vulnerability that allows on-path attackers to intercept HTTPS traffic by exploiting the default false value of SSLConnectConfig.validate and FetchConfig.validate, which completes TLS handshakes without verifying certificates in both the mbedtls and OpenSSL backends. Attackers can present an expired, self-signed, wrong-hostname, or untrusted-root certificate to successfully complete the handshake via http.get, http.post, or http.fetch, enabling interception or modification of HTTPS traffic unless validate: true is explicitly configured.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vlang/v | <= 0.5.2 | No fix listed |
References
- Github Security Advisory (GHSA-7g66-88pm-6gv6) vendor-advisory
- Patch Commit issue-tracking patch
- VulnCheck Advisory: V Programming Language net.http TLS Certificate Validation Bypass third-party-advisory