Critical severity · published Jul 30, 2026
CVE-2026-66756
Apache Tika: unpack endpoint in tika-server allows configuration with unsecureFeatures=false
9.8
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AT
Apache Tika · Apache Software Foundation
4.0.0-alpha-1 before 4.0.0-beta-1 · source: vendor
TI
Tika · Apache
4.0.0; 4.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66756
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66756
Mailing List
https://lists.apache.org/thread/ynjg5lxwhqpc83pczf5y5561o2l4o568
Mailing List
http://www.openwall.com/lists/oss-security/2026/07/30/24
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