`CVE-2016-5388` Apache Tomcat

Affected software	Apache Tomcat
Severity	8.1 High CVSS 3.0 2 scores
Fixed in	`7.0.72`, `8.5.5`
Weakness	Improper access control (CWE-284)
Published	19 Jul 2016
Updated	15 Oct 2026

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.

Exploitation status

Forecast only (51% 30-day chance)

No exploit has been reported in the sources we check. EPSS puts this CVE in the top 1.1% of all scored CVEs. That is a model's forecast, not a report of exploitation.

CISA KEV not listed
VulnCheck KEV not listed
CISA Vulnrichment exploitation: none
Indexed PoC none indexed
EPSS 51% chance in 30 days A model's forecast, not a report of exploitation. Higher than 99% of all scored CVEs.

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

A public code fix exists: apache/tomcat 1b91e91.

Protection none
Action unverified
Review automated Upstream data
Record active

Decided by	Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all
Finding	This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.

Decided by

Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all

Finding

This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.

CVSS

8.1 HIGH v3.0 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

Version Score Band Vector Assigner Type

CVSS 3.0 8.1 HIGH CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H NVD Primary published

CVSS 2.0 5.1 none AV:N/AC:H/Au:N/C:P/I:P/A:P NVD Primary

Version	Score	Band	Vector	Assigner	Type
CVSS 3.0	8.1	HIGH	`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`	NVD	Primary	published
CVSS 2.0	5.1	none	`AV:N/AC:H/Au:N/C:P/I:P/A:P`	NVD	Primary

Affected software and releases

Maven packages

Affected and fixed versions, from OSV.dev

Package Introduced Fixed Last affected

org.apache.tomcat:tomcat-catalina 7.0.0 7.0.72 unbounded

org.apache.tomcat:tomcat-catalina 8.0.0 8.5.5 unbounded

Package	Introduced	Fixed	Last affected
`org.apache.tomcat:tomcat-catalina`	7.0.0	`7.0.72`	unbounded
`org.apache.tomcat:tomcat-catalina`	8.0.0	`8.5.5`	unbounded

Products and versions

12 products, 20 version entries

Source	Vendor	Product	Scheme	Affected versions
nvd	apache	tomcat	generic	≥ 6.0 and ≤ 6.0.45 · ≥ 7.0 and ≤ 7.0.70 · ≥ 8.0 and ≤ 8.5.4
nvd	hp	system management homepage	generic	≤ 7.5.5.0
nvd	oracle	linux	generic	6 · 7
osv	org.apache.tomcat	tomcat-catalina	generic	≥ 7.0.0 and ＜ 7.0.72 · ≥ 8.0.0 and ＜ 8.5.5
nvd	redhat	enterprise linux desktop	generic	6.0 · 7.0
nvd	redhat	enterprise linux hpc node	generic	6.0 · 7.0
nvd	redhat	enterprise linux hpc node eus	generic	7.2
nvd	redhat	enterprise linux server	generic	6.0 · 7.0
nvd	redhat	enterprise linux server aus	generic	7.2
nvd	redhat	enterprise linux server eus	generic	7.2
nvd	redhat	enterprise linux server tus	generic	7.2
nvd	redhat	enterprise linux workstation	generic	6.0 · 7.0

Source

Vendor

Product

Scheme

Affected versions

nvd

apache

tomcat

generic

≥ 6.0 and ≤ 6.0.45 · ≥ 7.0 and ≤ 7.0.70 · ≥ 8.0 and ≤ 8.5.4

nvd

system management homepage

generic

≤ 7.5.5.0

nvd

oracle

linux

generic

6 · 7

osv

org.apache.tomcat

tomcat-catalina

generic

≥ 7.0.0 and ＜ 7.0.72 · ≥ 8.0.0 and ＜ 8.5.5

nvd

redhat

enterprise linux desktop

generic

6.0 · 7.0

nvd

redhat

enterprise linux hpc node

generic

6.0 · 7.0

nvd

redhat

enterprise linux hpc node eus

generic

7.2

nvd

redhat

enterprise linux server

generic

6.0 · 7.0

nvd

redhat

enterprise linux server aus

generic

7.2

nvd

redhat

enterprise linux server eus

generic

7.2

nvd

redhat

enterprise linux server tus

generic

7.2

nvd

redhat

enterprise linux workstation

generic

6.0 · 7.0

References

URL	Tags
https://github.com/apache/tomcat/commit/1b91e91194a095ea922f96d1dccddf6fbc446e54	WEB
https://github.com/apache/tomcat/commit/880250877b0643956435282afb9c111450cfff4c	WEB
https://github.com/apache/tomcat/commit/fb3569fbb9a2f55459aa8e1e22bc35a737e66329	WEB
https://access.redhat.com/errata/RHSA-2016:1624	WEB
https://lists.apache.org/thread.html/6d3d34adcf3dfc48e36342aa1f18ce3c20bb8e4c458a97508d5bfed1@%3Cissues.activemq.apache.org%3E	WEB
https://lists.apache.org/thread.html/r2853582063cfd9e7fbae1e029ae004e6a83482ae9b70a698996353dd%40%3Cusers.tomcat.apache.org%3E	WEB
https://lists.apache.org/thread.html/r2853582063cfd9e7fbae1e029ae004e6a83482ae9b70a698996353dd@%3Cusers.tomcat.apache.org%3E	WEB
https://lists.apache.org/thread.html/rc6b2147532416cc736e68a32678d3947b7053c3085cf43a9874fd102%40%3Cusers.tomcat.apache.org%3E	WEB
https://lists.apache.org/thread.html/rc6b2147532416cc736e68a32678d3947b7053c3085cf43a9874fd102@%3Cusers.tomcat.apache.org%3E	WEB
https://lists.apache.org/thread.html/rf21b368769ae70de4dee840a3228721ae442f1d51ad8742003aefe39%40%3Cusers.tomcat.apache.org%3E	WEB

URL

Timeline

Published	2016-07-19	By the CVE Program.
NVD record modified	2026-10-15	NVD's own last-modified date for this record.

Published

2016-07-19

By the CVE Program.

NVD record modified

2026-10-15

NVD's own last-modified date for this record.

How VRT decided (17 of 24 rules ran)

17 of 24 rules ran. The rest didn't run because an earlier rule had already settled the CVE.

# Rule Outcome Status Detail

identity: Does this identifier describe a vulnerability at all? the first rule that matches decides

1 rejected no match CVE Program withdrawal of this identifier

scope: Is it a vulnerability Waratek protects? the first rule that matches decides

2 armr-patch-file no match An ARMR patch file on disk for this CVE

3 armr-secure-rule-file no match An ARMR security-rule template on disk for this CVE

4 manual-classification no match A researcher's recorded decision for this specific CVE

5 manual classification no match Manual classification of this CVE in the legacy dataset

6 non-java-upstream no match A root cause in non-Java code: an OS kernel, a C library, or a bundled runtime

7 oracle-component no match The defect being in a component of a tracked product the agent does not reach: JavaFX, the Java SE installer, the JInitiator browser plug-in, the native WebLogic proxy plug-in, or a native part of Oracle Application Server or Collaboration Suite (HTTP Server, Web Cache, Internet Directory, mail and calendar servers). Oracle gives these no CPE of their own and names them only in the description.

8 java-client-side no match Oracle's own risk-matrix note saying the CVE is reached only through untrusted code in the Java sandbox (applets, Web Start) or only through a client installation of Java, so a server running its own trusted code is not exposed

9 osv-maven matched In scope Maven packages: org.apache.tomcat:tomcat-catalina

10 cna-maven-package not reached An affected Maven artifact named by the CNA itself

11 known-cpe-product not reached An NVD CPE naming a product ARMR tracks

12 cna-cpe-product not reached A CPE the CNA published naming a tracked product. Oracle publishes these on advisory day, months before NVD.

13 oracle-advisory-family not reached A tracked product family named in Oracle's own risk matrix. CPE cannot carry a suite name, only a module.

14 cna-named-product not reached A tracked product named in words by the CVE's own CNA, on a record with no CPE yet. Apache and Eclipse publish these on advisory day, before NVD adds CPE data.

15 non-deployable-product not reached The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached

16 unmatched-product not reached No tracked product matched above, and none present at all

disposition: What do we do about one that is? every rule runs

17 patch-hint no match A reference pointing at the upstream fix: a commit, a PR, a Red Hat bug

18 open-source-maven matched Mitigation candidate Open-source Maven artifact indexed by OSV (Maven packages: org.apache.tomcat:tomcat-catalina). The source is public, which makes an ARMR patch rule a candidate; nothing here establishes that one can be written.

19 poc-derivable skipped An indexed exploit clearing the evidence bar to reverse-engineer, where there is no source to read

20 no-exploit skipped Nothing to build a rule from yet: no published exploit, no CISA record of exploitation and no source-level change to read

21 secure-rule-match no match A vulnerability class already blocked by an ARMR security rule

22 exploited-no-fix-or-poc skipped Somebody exploiting this CVE (a CISA or VulnCheck KEV listing, or a CISA verdict of active exploitation), with no fix, source code or PoC to build a rule from

23 below-action-threshold no match Severity is HIGH — only MEDIUM/LOW are deprioritized

24 no-exploit-published decided it matched No exploit published No exploit code has been published, and an upstream fix path does exist, so the remediation half of the candidacy still holds.

Products the scope rules checked

The products this CVE's record names, and whether VRT tracks each one. The scope rules decided on these.

Vendor Product Tracked CPE Source

redhat enterprise_linux_desktop not tracked cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*

redhat enterprise_linux_hpc_node not tracked cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0:*:*:*:*:*:*:*

redhat enterprise_linux_hpc_node_eus not tracked cpe:2.3:o:redhat:enterprise_linux_hpc_node_eus:7.2:*:*:*:*:*:*:*

redhat enterprise_linux_server not tracked cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*

redhat enterprise_linux_server_aus not tracked cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:*

redhat enterprise_linux_server_eus not tracked cpe:2.3:o:redhat:enterprise_linux_server_eus:7.2:*:*:*:*:*:*:*

redhat enterprise_linux_server_tus not tracked cpe:2.3:o:redhat:enterprise_linux_server_tus:7.2:*:*:*:*:*:*:*

redhat enterprise_linux_workstation not tracked cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*

hp system_management_homepage not tracked cpe:2.3:a:hp:system_management_homepage:*:*:*:*:*:*:*:*

oracle linux not tracked cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:*

apache tomcat tracked cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* yaml

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