CVE-2016-6286: n/a vulnerability

CVE-2016-6286: The "spiffy-cgi-handlers" egg would convert a nonexistent "Proxy" header to the HTTP_PROXY environment vari...

The "spiffy-cgi-handlers" egg would convert a nonexistent "Proxy" header to the HTTP_PROXY environment variable, which would allow attackers to direct CGI programs which use this environment variable to use an attacker-specified HTTP proxy server (also known as a "httpoxy" attack). This affects all versions of spiffy-cgi-handlers before 0.5.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 01:22 UTC (UTC+00:00)

Security readout for executives and security teams

This issue affects older spiffy-cgi-handlers deployments. A crafted HTTP request could cause CGI code that trusts the HTTP_PROXY environment variable to send outbound HTTP traffic through an attacker-controlled proxy. That can expose or alter server-side outbound requests if vulnerable CGI paths are reachable. Exposure is likely limited to systems running spiffy-cgi-handlers before 0.5 with reachable CGI programs that make outbound HTTP requests and honor HTTP_PROXY. Organizations without this specific component or CGI pattern are unlikely to be affected. Treat as a targeted legacy web stack risk. Prioritize quickly if the organization runs public CGI services using spiffy-cgi-handlers; otherwise handle through normal dependency hygiene and legacy application review. Mitigation focus: Upgrade spiffy-cgi-handlers to version 0.5 or later.; Check the CHICKEN security announcement for related package guidance.; Remove reliance on HTTP_PROXY in CGI request-handling paths..

Prepared: Jun 13, 2026, 12:51 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jan 10, 2017, 15:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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1Source links

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CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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Weakness

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