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Fencer Vulns
high 7.5

CVE-2016-8747 json

Apache Tomcat allows remote attackers to read data that was intended to be associated with a different request

published 2017-03-14 9 y ago modified 2026-06-17 4 mo ago also GHSA-fjwp-r6fm-q6qw , EUVD-2022-3801

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
7.1%
EPSS 7.1% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

An information disclosure issue was discovered in Apache Tomcat 8.5.7 to 8.5.9 and 9.0.0.M11 to 9.0.0.M15 in reverse-proxy configurations. Http11InputBuffer.java allows remote attackers to read data that was intended to be associated with a different request.

Patch / fix

  • maven org.apache.tomcat:tomcat 8.5.10, 9.0.0.M16
  • apache tomcat 8.5.10

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-8747 updated cvss 4.7

tomcat: Information leak between requests on the same connection

  • Red Hat JBoss Fuse 6 tomcat8 tomcat8 Red Hat JBoss Web Server 3 tomcat8 tomcat8
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

7.12% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N
GitHub 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
maven org.apache.tomcat:tomcat
>=8.5.7, <8.5.10
>=9.0.0.M11, <9.0.0.M16
8.5.10
9.0.0.M16

Affected products

  • Apache Software Foundation Apache Tomcat

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.