HIGH
Tomcat: CGI sets environmental variable based on user supplied Proxy request header
Published Jul 19, 2016
8.1
HIGHCVSS 3.0
EPSS 50.90%
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.
Affected products
No data.
Configuration 1
OR
- 7.0
- 7.0
- 7.2
- 7.0
- 7.2
- 7.2
- 7.2
- 7.0
Configuration 2
- ≤ 7.5.5.0
Configuration 3
OR
- 6.0
- 6.0
- 6.0
- 6.0
No data.
Red Hat Enterprise Linux 6
tomcat6-0:6.0.24-98.el6_8
Fixed · RHSA-2016:2045
Red Hat Enterprise Linux 7
tomcat-0:7.0.54-8.el7_2
Fixed · RHSA-2016:2046
Red Hat JBoss Web Server 3 for RHEL 6
httpd24-0:2.4.6-62.ep7.el6
Fixed · RHSA-2016:1636
Red Hat JBoss Web Server 3 for RHEL 6
tomcat7-0:7.0.59-51_patch_01.ep7.el6
Fixed · RHSA-2016:1636
Red Hat JBoss Web Server 3 for RHEL 6
tomcat8-0:8.0.18-62_patch_01.ep7.el6
Fixed · RHSA-2016:1636
Red Hat JBoss Web Server 3 for RHEL 7
httpd24-0:2.4.6-62.ep7.el7
Fixed · RHSA-2016:1635
Red Hat JBoss Web Server 3 for RHEL 7
tomcat7-0:7.0.59-51_patch_01.ep7.el7
Fixed · RHSA-2016:1635
Red Hat JBoss Web Server 3 for RHEL 7
tomcat8-0:8.0.18-62_patch_01.ep7.el7
Fixed · RHSA-2016:1635
Red Hat JBoss Web Server 3.0
n/a
Fixed · RHSA-2016:1624
Red Hat Enterprise Linux 5
tomcat5
Under investigation
Red Hat JBoss Enterprise Application Platform 5
jbossas
Will not fix
Red Hat JBoss Enterprise Application Platform 6
tomcat
Affected
Red Hat JBoss Enterprise Web Server 1
tomcat
Will not fix
Red Hat JBoss Enterprise Web Server 2
tomcat7
Affected
Red Hat JBoss Enterprise Web Server 2
tomcat8
Affected
Red Hat JBoss Enterprise Web Server 3
tomcat6
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | tomcat6-0:6.0.24-98.el6_8 | Fixed | RHSA-2016:2045 |
| Red Hat Enterprise Linux 7 | tomcat-0:7.0.54-8.el7_2 | Fixed | RHSA-2016:2046 |
| Red Hat JBoss Web Server 3 for RHEL 6 | httpd24-0:2.4.6-62.ep7.el6 | Fixed | RHSA-2016:1636 |
| Red Hat JBoss Web Server 3 for RHEL 6 | tomcat7-0:7.0.59-51_patch_01.ep7.el6 | Fixed | RHSA-2016:1636 |
| Red Hat JBoss Web Server 3 for RHEL 6 | tomcat8-0:8.0.18-62_patch_01.ep7.el6 | Fixed | RHSA-2016:1636 |
| Red Hat JBoss Web Server 3 for RHEL 7 | httpd24-0:2.4.6-62.ep7.el7 | Fixed | RHSA-2016:1635 |
| Red Hat JBoss Web Server 3 for RHEL 7 | tomcat7-0:7.0.59-51_patch_01.ep7.el7 | Fixed | RHSA-2016:1635 |
| Red Hat JBoss Web Server 3 for RHEL 7 | tomcat8-0:8.0.18-62_patch_01.ep7.el7 | Fixed | RHSA-2016:1635 |
| Red Hat JBoss Web Server 3.0 | n/a | Fixed | RHSA-2016:1624 |
| Red Hat Enterprise Linux 5 | tomcat5 | Under investigation | n/a |
| Red Hat JBoss Enterprise Application Platform 5 | jbossas | Will not fix | n/a |
| Red Hat JBoss Enterprise Application Platform 6 | tomcat | Affected | n/a |
| Red Hat JBoss Enterprise Web Server 1 | tomcat | Will not fix | n/a |
| Red Hat JBoss Enterprise Web Server 2 | tomcat7 | Affected | n/a |
| Red Hat JBoss Enterprise Web Server 2 | tomcat8 | Affected | n/a |
| Red Hat JBoss Enterprise Web Server 3 | tomcat6 | Affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
8.1 HIGH NVD
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
1 other source (Red Hat) ▾
3.5 LOW Red Hat
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact None
Integrity Impact Low
Availability Impact None
5.1 MEDIUM NVD
AV:N/AC:H/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity High
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
50.90% 0.50896
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.50896
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (60 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 50.90% (0.50896) | 98.90th | v5 (v2026.06.15) |
| Sep 22, 2026 | 50.90% (0.50896) | 98.88th | v5 (v2026.06.15) |
| Sep 21, 2026 | 40.70% (0.40702) | 98.63th | v5 (v2026.06.15) |
| Sep 6, 2026 | 50.90% (0.50896) | 98.85th | v5 (v2026.06.15) |
| Sep 5, 2026 | 40.70% (0.40702) | 98.60th | v5 (v2026.06.15) |
| Aug 30, 2026 | 50.90% (0.50896) | 98.84th | v5 (v2026.06.15) |
| Aug 28, 2026 | 40.70% (0.40702) | 98.59th | v5 (v2026.06.15) |
| Aug 24, 2026 | 50.90% (0.50896) | 98.84th | v5 (v2026.06.15) |
| Aug 23, 2026 | 40.70% (0.40702) | 98.59th | v5 (v2026.06.15) |
| Jun 15, 2026 | 50.90% (0.50896) | 98.78th | v5 (v2026.06.15) |
| Jun 7, 2026 | 40.67% (0.40671) | 97.45th | v4 (v2025.03.14) |
| Apr 4, 2026 | 36.76% (0.36760) | 97.13th | v4 (v2025.03.14) |
| Mar 30, 2026 | 31.22% (0.31217) | 96.73th | v4 (v2025.03.14) |
| Mar 4, 2026 | 36.76% (0.36760) | 97.06th | v4 (v2025.03.14) |
| Mar 1, 2026 | 9.40% (0.09402) | 92.68th | v4 (v2025.03.14) |
| Feb 19, 2026 | 36.76% (0.36760) | 97.04th | v4 (v2025.03.14) |
| Feb 18, 2026 | 40.67% (0.40671) | 97.27th | v4 (v2025.03.14) |
| Feb 4, 2026 | 65.44% (0.65438) | 98.43th | v4 (v2025.03.14) |
| Feb 1, 2026 | 28.35% (0.28353) | 96.41th | v4 (v2025.03.14) |
| Jan 4, 2026 | 65.44% (0.65438) | 98.42th | v4 (v2025.03.14) |
| Jan 1, 2026 | 28.35% (0.28353) | 96.38th | v4 (v2025.03.14) |
| Dec 23, 2025 | 65.44% (0.65438) | 98.41th | v4 (v2025.03.14) |
| Dec 4, 2025 | 70.69% (0.70686) | 98.63th | v4 (v2025.03.14) |
| Dec 1, 2025 | 34.35% (0.34348) | 96.84th | v4 (v2025.03.14) |
| Nov 18, 2025 | 70.69% (0.70686) | 98.74th | v4 (v2025.03.14) |
| Nov 4, 2025 | 73.80% (0.73802) | 98.75th | v4 (v2025.03.14) |
| Nov 1, 2025 | 38.89% (0.38890) | 97.11th | v4 (v2025.03.14) |
| Oct 15, 2025 | 73.80% (0.73802) | 98.76th | v4 (v2025.03.14) |
| Oct 4, 2025 | 69.06% (0.69064) | 98.58th | v4 (v2025.03.14) |
| Oct 1, 2025 | 32.58% (0.32584) | 96.73th | v4 (v2025.03.14) |
| Sep 5, 2025 | 69.06% (0.69064) | 98.58th | v4 (v2025.03.14) |
| Sep 1, 2025 | 32.58% (0.32584) | 96.74th | v4 (v2025.03.14) |
| Aug 28, 2025 | 69.06% (0.69064) | 98.57th | v4 (v2025.03.14) |
| Aug 4, 2025 | 66.01% (0.66010) | 98.43th | v4 (v2025.03.14) |
| Aug 1, 2025 | 28.98% (0.28977) | 96.42th | v4 (v2025.03.14) |
| Jul 27, 2025 | 66.01% (0.66010) | 98.42th | v4 (v2025.03.14) |
| Jul 23, 2025 | 69.06% (0.69064) | 98.55th | v4 (v2025.03.14) |
| Jul 4, 2025 | 75.02% (0.75024) | 98.80th | v4 (v2025.03.14) |
| Jul 1, 2025 | 40.07% (0.40072) | 97.18th | v4 (v2025.03.14) |
| Jun 19, 2025 | 75.02% (0.75024) | 98.80th | v4 (v2025.03.14) |
| Jun 18, 2025 | 66.01% (0.66010) | 98.39th | v4 (v2025.03.14) |
| Jun 4, 2025 | 69.06% (0.69064) | 98.53th | v4 (v2025.03.14) |
| Jun 1, 2025 | 32.58% (0.32584) | 96.64th | v4 (v2025.03.14) |
| May 4, 2025 | 69.06% (0.69064) | 98.52th | v4 (v2025.03.14) |
| May 1, 2025 | 32.58% (0.32584) | 96.60th | v4 (v2025.03.14) |
| Apr 20, 2025 | 69.06% (0.69064) | 98.51th | v4 (v2025.03.14) |
| Apr 15, 2025 | 73.80% (0.73802) | 98.71th | v4 (v2025.03.14) |
| Mar 31, 2025 | 80.76% (0.80764) | 99.09th | v4 (v2025.03.14) |
| Mar 30, 2025 | 45.43% (0.45431) | 97.34th | v4 (v2025.03.14) |
| Mar 29, 2025 | 69.01% (0.69011) | 98.12th | v4 (v2025.03.14) |
| Mar 22, 2025 | 80.76% (0.80764) | 99.13th | v4 (v2025.03.14) |
| Mar 21, 2025 | 45.43% (0.45431) | 97.37th | v4 (v2025.03.14) |
| Mar 19, 2025 | 80.76% (0.80764) | 99.08th | v4 (v2025.03.14) |
| Mar 18, 2025 | 45.43% (0.45431) | 97.34th | v4 (v2025.03.14) |
| Mar 17, 2025 | 80.76% (0.80764) | 99.10th | v4 (v2025.03.14) |
| Dec 17, 2024 | 96.33% (0.96332) | 99.69th | v3 (v2023.03.01) |
| Mar 7, 2023 | 94.82% (0.94822) | 98.76th | v3 (v2023.03.01) |
| Mar 6, 2023 | 7.34% (0.07344) | 92.59th | v2 (v2022.01.01) |
| Apr 1, 2022 | 7.34% (0.07344) | 91.87th | v2 (v2022.01.01) |
| Feb 4, 2022 | 7.34% (0.07344) | 80.64th | v2 (v2022.01.01) |
Weaknesses (2)
References (47)
- http://lists.opensuse.org/opensuse-updates/2016-09/msg00025.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1624.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2045.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2046.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.kb.cert.org/vuls/id/797896 third-party-advisoryx_refsource_CERT-VNThird Party AdvisoryUS Government Resource
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html x_refsource_CONFIRMPatchThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/91818 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1036331 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB EntryVendor Advisory
- https://access.redhat.com/errata/RHSA-2016:1624
- https://access.redhat.com/errata/RHSA-2016:1635 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2016:1636 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2016:2045
- https://access.redhat.com/errata/RHSA-2016:2046
- https://access.redhat.com/security/cve/CVE-2016-5388 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1353809 Issue Tracking
- https://github.com/advisories/GHSA-v646-rx6w-r3qq Advisory
- https://github.com/apache/tomcat/commit/1b91e91194a095ea922f96d1dccddf6fbc446e54
- https://github.com/apache/tomcat/commit/880250877b0643956435282afb9c111450cfff4c
- https://github.com/apache/tomcat/commit/fb3569fbb9a2f55459aa8e1e22bc35a737e66329
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03770en_us x_refsource_CONFIRMThird Party Advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149 x_refsource_CONFIRMThird Party Advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05324759 x_refsource_CONFIRMThird Party Advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722 x_refsource_CONFIRMThird Party Advisory
- https://httpoxy.org/ x_refsource_MISCThird Party Advisory
- https://lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272%40%3Cissues.activemq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272@%3Cissues.activemq.apache.org%3E
- https://lists.apache.org/thread.html/6b414817c2b0bf351138911c8c922ec5dd577ebc0b9a7f42d705752d%40%3Cissues.activemq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/6b414817c2b0bf351138911c8c922ec5dd577ebc0b9a7f42d705752d@%3Cissues.activemq.apache.org%3E
- https://lists.apache.org/thread.html/6d3d34adcf3dfc48e36342aa1f18ce3c20bb8e4c458a97508d5bfed1%40%3Cissues.activemq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/6d3d34adcf3dfc48e36342aa1f18ce3c20bb8e4c458a97508d5bfed1@%3Cissues.activemq.apache.org%3E
- https://lists.apache.org/thread.html/r2853582063cfd9e7fbae1e029ae004e6a83482ae9b70a698996353dd%40%3Cusers.tomcat.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r2853582063cfd9e7fbae1e029ae004e6a83482ae9b70a698996353dd@%3Cusers.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rc6b2147532416cc736e68a32678d3947b7053c3085cf43a9874fd102%40%3Cusers.tomcat.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rc6b2147532416cc736e68a32678d3947b7053c3085cf43a9874fd102@%3Cusers.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rf21b368769ae70de4dee840a3228721ae442f1d51ad8742003aefe39%40%3Cusers.tomcat.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rf21b368769ae70de4dee840a3228721ae442f1d51ad8742003aefe39@%3Cusers.tomcat.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2019/08/msg00015.html mailing-listx_refsource_MLIST
- https://lists.opensuse.org/opensuse-updates/2016-09/msg00025.html
- https://nvd.nist.gov/vuln/detail/CVE-2016-5388
- https://rhn.redhat.com/errata/RHSA-2016-1624.html
- https://rhn.redhat.com/errata/RHSA-2016-2045.html
- https://rhn.redhat.com/errata/RHSA-2016-2046.html
- https://tomcat.apache.org/tomcat-7.0-doc/changelog.html x_refsource_CONFIRMRelease NotesVendor Advisory
- https://www.apache.org/security/asf-httpoxy-response.txt x_refsource_CONFIRMVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-5388
- https://www.kb.cert.org/vuls/id/797896
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Jul 19, 2016
Updated Aug 6, 2024
Reserved Jun 10, 2016
Link CVE-2016-5388
CISA Vulnrichment
GHSA-V646-RX6W-R3QQ Updated n/a