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

Status: published. Published: 2026-11-05. Updated: 2026-11-05.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Apache Software Foundation / Apache Juneau (org.apache.juneau:juneau-microservice-core): ≥ 0; < 9.2.1 (affected, semver). Source: CNA: apache
- Apache Software Foundation / Apache Juneau (org.apache.juneau:juneau-commons): ≥ 0; < 9.2.1 (affected, semver). Source: CNA: apache

## Severity and prioritization

- CVSS 4.0: 10 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H; source: CNA: apache

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-22

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://lists.apache.org/thread.html/j05q7vw08j48o96tdlzcsd4sozx1lyl6 (CNA: apache; vendor-advisory)

## Provenance

- CNA: apache: https://www.cve.org/CVERecord?id=CVE-2026-121489; retrieved 2026-11-05; source updated 2026-11-05

Revision: 4517b001f685fc34282729768db9fb9abcf42524f86171081e9bc1ef9d10ec77

Canonical: https://y2.dev/cve/CVE-2026-121489

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