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CVE-2026-66755: Apache Tika: Arbitrary Local File Read in ISArchiveParser

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% 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-22

Description

Relative Path Traversal in the ISA-Tab parser in Apache Software Foundation Apache Tika from 1.8 through 3.3.1, and 4.0.0-alpha-1, allows an attacker who can place files in a directory that the application subsequently parses to read arbitrary files accessible to the Tika process and have their contents emitted into the extracted text output, via a "Study Assay File Name" value in the ISA-Tab investigation file that traverses outside the dataset directory. Users are recommended to upgrade to version 3.3.2 or 4.0.0-beta-1, which fixes this issue.

Affected products

• Apache Software Foundation Apache Tika: from 1.8 before 3.3.2; 4.0.0-alpha1, 4.0.0-beta1-rc1 — fixed in 3.3.2

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Tika 3.3.2. Check the vendor advisory for mitigations.

References

• https://lists.apache.org/thread/0hcctcp9s5lxgq2ookp4o6chltk99f8r
• http://www.openwall.com/lists/oss-security/2026/07/30/23

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