CVE-2026-121489

Critical

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.

SeverityCritical

CVSS10.0

Exploit probability—

ProductApache Juneau

PublishedNov 5, 2026

First seenNov 5, 2026

Weakness typeCWE-22Path traversal

How to fix

Update

Apache Software Foundation Apache Juneau9.2.1 or later

Vendor advisories

lists.apache.org/thread.html/j05q7vw08j48o96tdlzcsd4sozx1lyl6

Affected products

Product	Affected versions	Fixed in
Apache Software Foundation Apache Juneau	v < 9.2.1	9.2.1

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