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Advisory severityCritical10.0Apache Software Foundation Updated

Critical [CVE-2026-121489] Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Apache Juneau

This critical-severity Apache Software Foundation advisory covers CVE-2026-121489 affecting Apache Juneau.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-121489 Source published Source updated

VulniPulse record published Record updated

CVE-2026-121489
Affected products & platforms
Apache Software FoundationUnclassified
Open source advisory

Summary

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.

Is CVE-2026-121489 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-121489 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-121489?

Upgrade to a fixed release named by Apache:

  • 9.2.1

Confirm against the vendor advisory before you patch.

Affected versions
  • through 9.2.0

Official advisory · high-confidence parse· fetched 2 days ago·verify at source

Fixed versions
  • 9.2.1

Official advisory · high-confidence parse· fetched 2 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Users are recommended to upgrade to version 9.2.1, which fixes the issue.

Official advisory · high-confidence parse· fetched 2 days ago·verify at source

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