No exploitation reportedFix available

CVE-2016-5388

No exploitation reported by the sources we read.

Published2016-07-19
WeaknessCWE-284

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

Apache Tomcat 7.x through 7.0.70 and 8.x through 8.5.4, when the CGI Servlet is enabled, follows RFC 3875 section 4.1.18 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, aka an "httpoxy" issue. NOTE: the vendor states "A mitigation is planned for future releases of Tomcat, tracked as CVE-2016-5388"; in other words, this is not a CVE ID for a vulnerability.

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-2016-5388?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-5388?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Apache Tomcat

Branch	Affected	Fixed in	Source
6.0	≥ 6.0, ≤ 6.0.45	no fix published	NVD
7.0	≥ 7.0, ≤ 7.0.70	no fix published	NVD
8.x	≥ 8.0, ≤ 8.5.4	no fix published	NVD

Oracle linux

Branch	Affected	Fixed in	Source
6.x	= 6	no fix published	NVD
7.x	= 7	no fix published	NVD

Redhat enterprise linux desktop

Branch	Affected	Fixed in	Source
7.0	= 7.0	no fix published	NVD
6.0	= 6.0	no fix published	NVD

8 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

www.oracle.comPatch
www.securitytracker.comVendor Advisory
tomcat.apache.orgRelease Notes · Vendor Advisory
www.apache.orgVendor Advisory

Detection

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

Sources

CISA-ADPSSVC decisionnone2026-10-15
OpenCVESSVC decisionnone—
NVDCVSS 3.08.1read 2026-10-23
NVDCVSS 2.05.1read 2026-10-23
NVDweakness (CWE)CWE-284read 2026-10-23
FIRST EPSSEPSS score50.9 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2016-07-19
Last Modified: 2026-10-15
NVD status: Modified

Frequently asked questions

What is CVE-2016-5388?

Is CVE-2016-5388 actively exploited?

Active exploitation of CVE-2016-5388 has not been confirmed. Its EPSS score was 50.9% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-5388?

CVE-2016-5388 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

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