CVE-2016-8745
HIGHEPSS 97th pctlDescription
A bug in the error handling of the send file code for the NIO HTTP connector in Apache Tomcat 9.0.0.M1 to 9.0.0.M13, 8.5.0 to 8.5.8, 8.0.0.RC1 to 8.0.39, 7.0.0 to 7.0.73 and 6.0.16 to 6.0.48 resulted in the current Processor object being added to the Processor cache multiple times. This in turn meant that the same Processor could be used for concurrent requests. Sharing a Processor can result in information leakage between requests including, not not limited to, session ID and the response body. The bug was first noticed in 8.5.x onwards where it appears the refactoring of the Connector code for 8.5.x onwards made it more likely that the bug was observed. Initially it was thought that the 8.5.x refactoring introduced the bug but further investigation has shown that the bug is present in all currently supported Tomcat versions.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Exploit Intelligence
Very high risk: more likely to be exploited than 97% of all known CVEs.
References
- rhn.redhat.com
- rhn.redhat.com
- debian.org
- debian.org
- oracle.com
- oracle.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- lists.apache.org
- lists.apache.org
- lists.apache.org
- lists.apache.org
- lists.apache.org
- lists.apache.org
- lists.apache.org
- lists.apache.org
- lists.apache.org
- lists.apache.org
- lists.apache.org
- lists.apache.org
- lists.apache.org
- lists.apache.org
- lists.apache.org
- lists.apache.org
- lists.apache.org
- security.netapp.com
Related Vulnerabilities
Other CWE-388 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2018-1002105 | Critical | 9.8 | 87% | - | Fix |
| CVE-2018-0155 | High | 8.6 | 7.8% | KEV | - |
| CVE-2016-9778 | High | 7.5 | 6.8% | - | - |
| CVE-2014-9841 | Critical | 9.8 | 3.9% | - | Fix |
| CVE-2014-9826 | Critical | 9.8 | 3.7% | - | Fix |
| CVE-2017-5401 | Critical | 9.8 | 3.1% | - | Fix |
Common questions
How do I fix CVE-2016-8745?
Published advisories record a fix for 4 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2016-8745 being actively exploited?
Not that we know of. CVE-2016-8745 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 16.0% is the estimated probability that it will be exploited in the next 30 days. That is higher than 97% of all scored CVEs.
How severe is CVE-2016-8745?
CVE-2016-8745 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2016-8745 affect?
Published advisories record a fix for libtomcat7-java (Ubuntu), libtomcat8-java (Ubuntu), tomcat7 (Ubuntu), tomcat8 (Ubuntu). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.