CVE-2026-66756: Apache Tika: unpack endpoint in tika-server allows configuration with unsecureFeatures=false

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-30 · updated 2026-10-23
Weakness: CWE-424

Description

Improper Protection of Alternate Path vulnerability in Apache Tika. This issue affects Apache Tika: from 4.0.0-alpha-1 before 4.0.0-beta-1. Users are recommended to upgrade to version 4.0.0-beta-1, which fixes the issue.

Affected products

Apache Software Foundation Apache Tika: 4.0.0-alpha1, 4.0.0-beta1-rc1

References

https://lists.apache.org/thread/ynjg5lxwhqpc83pczf5y5561o2l4o568
http://www.openwall.com/lists/oss-security/2026/07/30/24

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