CVE-2026-121489 Apache Juneau: Path traversal in DirectoryResource allows reading files outside the configured root directory

Description

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Apache Juneau. The microservice DirectoryResource does not keep request paths inside its configured root directory. When an application enables the resource's view, upload or delete settings (all off by default), a client can read, write or delete files outside the root, anywhere the server process has access. This issue affects Apache Juneau: through 9.2.0. Users are recommended to upgrade to version 9.2.1, which fixes the issue.

Exploitable remotely over the network, without an account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector

Network

Attack complexity

Low

Attack requirements

None

Privileges required

None

Interaction

None

Confidentiality

High

Integrity

High

Availability

High

Confidentiality of other systems

High

Integrity of other systems

High

Availability of other systems

High

Affected products and versions