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

Quick assessment

Affected
Apache Software Foundation Apache Tika
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Tika 中存在替代路径保护不当的漏洞。 该漏洞影响 Apache Tika 从 4.0.0-alpha-1 到 4.0.0-beta-1（不含 4.0.0-beta-1）的版本。 建议用户升级至版本 4.0.0-beta-1，该版本已修复此问题。

CVSS 6.9 · Medium EPSS 0.75% · P53

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Tika 4.0.0-alpha-1< 4.0.0-beta-1 affected
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I. Basic Information for CVE-2026-66756

Vulnerability Information
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Vulnerability Title
Apache Tika: unpack endpoint in tika-server allows configuration with unsecureFeatures=false
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对候选路径的不恰当保护
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Tika 4.0.0-alpha-1 ~ 4.0.0-beta-1 -

II. Public POCs for CVE-2026-66756

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III. Intelligence Information for CVE-2026-66756

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Mailing List Discussions for CVE-2026-66756 (1)

Same Patch Batch · Apache Software Foundation · 2026-07-30 · 13 CVEs total

CVE-2026-66755 5.9 MEDIUM Apache Tika: Arbitrary Local File Read in ISArchiveParser
CVE-2026-23981 5.3 MEDIUM Apache Superset: Improper Authorization in Chart Update allowing Dashboard Modification
CVE-2026-23985 5.3 MEDIUM Apache Superset: Regular Expression Denial of Service (ReDoS) in SQL Parser
CVE-2026-44613 Apache Zeppelin: Cross-site request forgery in REST and WebSocket request handling
CVE-2026-44616 Apache Zeppelin: LDAP injection in ActiveDirectoryGroupRealm filter construction
CVE-2026-44617 Apache Zeppelin: LDAP filter injection in LdapRealm — incomplete fix of CVE-2024-31867
CVE-2026-28811 Apache JSPWiki: Error Handling - Reveals Error Details
CVE-2026-28812 Apache JSPWiki: UserManager does not sanity-check user database at startup
CVE-2026-28813 Apache JSPWiki: JSPWiki vulnerable to JSON hijacking
CVE-2026-28814 Apache JSPWiki: Pre-Authentication Arbitrary Wiki Markup Rendering
CVE-2026-48910 Apache JSPWiki: Markdown parser allows XSS injection in Markdown error processing
CVE-2026-52680 Apache Kyuubi: REST batch multipart upload path traversal allows controlled file write

IV. Related Vulnerabilities

Same product: Apache Tika
Same vendor: Apache Software Foundation
Same weakness: CWE-424

V. Comments for CVE-2026-66756

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