CVE-2016-8745

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.0 7.5/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-388

Affected software

VendorProductVersions
Apache Software FoundationApache Tomcat9.0.0.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; 6.0.16 to 6.0.48

References

Timeline

Published
Aug 10, 2017
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2016

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CVE-2016-8745: High severity, CVSS 7.5 | Vulnix