8.1

CVE-2016-5388: apache tomcat Improper Access Control

Modified
AliasesMGASA-2016-0312SUSE-SU-2016:2229-1UBUNTU-CVE-2016-5388
Published 19-07-2016Last modified 15-10-2026

Vulnerability summary

CVE-2016-5388 is a high (CVSS 8.1) Improper Access Control vulnerability in apache tomcat. EPSS estimates a 50.90% chance of exploitation in the next 30 days, higher than 98.9% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 8.1 (NVD); no exploitation reported by the 5 checked sources; EPSS 51% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
8.1/10
010
High · v3.0 (NVD)
EPSS score
50.90%
0%100%
Critical · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 10 · Duplicates 1 · Related 5
DLA-1883-1RHSA-2016:1635RHSA-2016:1636RHSA-2016:2045RHSA-2016:2046SUSE-SU-2016:2188-1

Timeline

  1. 19-07-2016
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

50.90%

Chance of exploitation in the next 30 days

Percentile

99%

Versus all other CVEs

30-day change

No change 0.00 pp

From 50.90% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat8 products
Ubuntu3 products
  • tomcat6All versions (No fix recorded)
  • tomcat7< 7.0.52-1ubuntu0.8 | < 7.0.68-1ubuntu0.4+esm1
  • tomcat8< 8.0.32-1ubuntu1.3
Suse2 products
  • tomcat6&distro=SUSE Linux Enterprise Server 11 SP4< 6.0.45-0.53.2
  • tomcat6&distro=SUSE Linux Enterprise Server for SAP Applications 11 SP4< 6.0.45-0.53.2
Apache1 product
  • tomcat≥ 6.0, ≤ 6.0.45 | ≥ 7.0, ≤ 7.0.70 | ≥ 8.0, ≤ 8.5.4
Hp1 product
Mageia1 product
  • tomcat< 7.0.68-1.3.mga5
Oracle1 product
Org.apache.tomcat1 product
  • tomcat-catalina≥ 7.0.0, < 7.0.72 | ≥ 8.0.0, < 8.5.5

8 vendors · 18 products

References

55 links
Show all 55 references