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CVE-2016-5386

8.1
HIGHCVSS v3.1 Base Score
45.90%
MEDIUM RiskEPSS (98th percentile)

The net/http package in Go through 1.6 does not attempt to address RFC 3875 section 4.1.18 namespace conflicts and therefore does not protect CGI applications from the presence of untrusted client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect a CGI application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an "httpoxy" issue.

Published: 7/19/2016
Modified: 5/6/2026
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Vulnerability Summary

CVSS v3 Score

8.1HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2 Score

6.8

AV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS Score (Exploitation Probability)

45.90%MEDIUM Exploitation Risk
98th percentile

This vulnerability has a 45.90% probability of being exploited in the next 30 days, ranking higher than 98% of all scored CVEs.

CWE Classification

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Same Weakness Type(CWE-284)

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Similar SeverityHIGH