Link following in Apache Tika - CVE-2026-66756
Published: August 24, 2026
Vulnerability identifier: #VU144803
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-66756
CWE-ID: CWE-59
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to access files via an alternate path.
The vulnerability exists due to improper protection of alternate path in the unpack endpoint of tika-server when handling unpack requests. A remote attacker can send a specially crafted request to access files via an alternate path.
Affected software
Apache Tika
How to mitigate CVE-2026-66756
Install security update from vendor's website.
Apache Tika - update to 4.0.0 beta-1