SEPTEMBER 17, 2026
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Case File

CVE-2026-91143

HIGH · CVSS 7.2 EPSS 0.27% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-14 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

The vulnerability in goproxy versions up to 15.3 allows unauthenticated clients to bypass basic authentication for CONNECT tunnel requests, enabling them to relay arbitrary TCP traffic and access restricted destinations. This poses a significant security risk as it can lead to unauthorized access and potential data breaches. Organizations using goproxy should prioritize patching this vulnerability to safeguard their network infrastructure.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links
github.com ↗ github.com ↗ github.com ↗ github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-91143
Severity
HIGH
CVSS
7.2
EPSS
0.27%

Original NVD Description

goproxy through 15.3 fails to apply HTTP proxy basic authentication to CONNECT tunnel requests, allowing unauthenticated clients to bypass credential requirements. Attackers can issue CONNECT requests to establish tunnels through the authenticated proxy without providing credentials, enabling arbitrary TCP traffic relay and access to restricted destinations.