No exploitation reportedFix available

CVE-2016-5385

Q: Is CVE-2016-5385 actively exploited?

Active exploitation of CVE-2016-5385 has not been confirmed. Its EPSS score was 50.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2016-5385?

CVE-2016-5385 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2016-07-19
WeaknessCWE-601

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

PHP through 7.0.8 does not attempt to address RFC 3875 section 4.1.18 namespace conflicts and therefore does not protect applications from the presence of untrusted client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect an application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, as demonstrated by (1) an application that makes a getenv('HTTP_PROXY') call or (2) a CGI configuration of PHP, aka an "httpoxy" issue.

Timeline

dates in UTC

2016-07-1902:00CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-5385?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-5385?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Oracle communications user data repository

Branch	Affected	Fixed in	Source
10.0	= 10.0.0	no fix published	NVD
10.0	= 10.0.1	no fix published	NVD
12.0	= 12.0.0	no fix published	NVD

PHP

Branch	Affected	Fixed in	Source
5.6	≥ 5.6.0, < 5.6.24	5.6.24	NVD
5.5	≥ 5.5.0, < 5.5.38	5.5.38	NVD
7.0	≥ 7.0.0, ≤ 7.0.8	no fix published	NVD

Fedoraproject fedora

Branch	Affected	Fixed in	Source
23.x	= 23	no fix published	NVD
24.x	= 24	no fix published	NVD

10 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.18.1read 2026-10-23
NVDCVSS 2.05.1read 2026-10-23
NVDweakness (CWE)CWE-601read 2026-10-23
FIRST EPSSEPSS score50.4 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2016-07-19
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2016-5385?

Is CVE-2016-5385 actively exploited?

Active exploitation of CVE-2016-5385 has not been confirmed. Its EPSS score was 50.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-5385?

CVE-2016-5385 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

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