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CVE-2018-11796

7.5 · HIGH

In Apache Tika 1.19 (CVE-2018-11761), we added an entity expansion limit for XML parsing.

Published Oct 9, 2018CWE-611EPSS 7.54%

Overview

CVE-2018-11796 is a high-severity vulnerability. It was published on October 9, 2018 and has a CVSS 3.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In Apache Tika 1.19 (CVE-2018-11761), we added an entity expansion limit for XML parsing. However, Tika reuses SAXParsers and calls reset() after each parse, which, for Xerces2 parsers, as per the documentation, removes the user-specified SecurityManager and thus removes entity expansion limits after the first parse. Apache Tika versions from 0.1 to 1.19 are therefore still vulnerable to entity expansions which can lead to a denial of service attack. Users should upgrade to 1.19.1 or later.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/105585Refaccess.redhat.com/errata/RHSA-2019:3892Reflists.apache.org/thread.html/88de8350cda9b184888ec294c813c5bd8a2081de8fd3666f8904bc05%40%3Cdev.tika.apache.org%3ERefsecurity.netapp.com/advisory/ntap-20190903-0002/Refwww.securityfocus.com/bid/105585Refaccess.redhat.com/errata/RHSA-2019:3892Reflists.apache.org/thread.html/88de8350cda9b184888ec294c813c5bd8a2081de8fd3666f8904bc05%40%3Cdev.tika.apache.org%3ERefsecurity.netapp.com/advisory/ntap-20190903-0002/

How CyberStrike helps

Frequently asked questions

What is CVE-2018-11796?

CVE-2018-11796 is a high-severity vulnerability. It was published on October 9, 2018 and has a CVSS 3.0 base score of 7.5 (HIGH).

How severe is CVE-2018-11796?

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-11796?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2018-11796?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-11796 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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