TI-2016-05381 Aliases CVE-2016-6287 GHSA-xrv7-w6wq-5f4g

The "http-client" egg always used a HTTP_PROXY environment variable to determine whether…

LOW 36CWE-19Published 2017-01-10 · Updated 2024-08-06

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · High · None
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

The "http-client" egg always used a HTTP_PROXY environment variable to determine whether HTTP traffic should be routed via a proxy, even when running as a CGI process. Under several web servers this would mean a user-supplied "Proxy" header could allow an attacker to direct all HTTP requests through a proxy (also known as a "httpoxy" attack). This affects all versions of http-client before 0.10.

Why it matters now

EPSS 0.01476 74th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:call-cc:http-client::::::::	up to 0.9	Vulnerable	chicken

cpe:2.3:a:call-cc:http-client:*:*:*:*:*:*:*:* Versions up to 0.9 Vulnerable ·chicken

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2016-6287
2026-10-03 Alias added: GHSA-xrv7-w6wq-5f4g

References

Advisory 1

[chicken-announce] 20160721 [SECURITY] spiffy-cgi-handlers and http-client updated to prevent "httpoxy" attack

TI-2016-05380 The "spiffy-cgi-handlers" egg would convert a nonexistent "Proxy" header to the… CVSS 3.0HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences