Is there a public exploit for CVE-2026-121489?

No public exploit for CVE-2026-121489 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-121489?

CVE-2026-121489 scores CVSS 10 (v4.0), rated critical.

What does CVE-2026-121489 affect?

CVE-2026-121489 affects Apache Software Foundation Apache Juneau.

10.0 Critical

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Apache Juneau.

CVE-2026-121489

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.

Assessment

CVSS: 10 (v4.0)
Severity: Critical
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 5 November 2026
Last updated: 5 November 2026
Affected: Apache Software Foundation · Apache Juneau
Assigner: apache

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

At the source

EUVD (ENISA)

References

https://lists.apache.org/thread.html/j05q7vw08j48o96tdlzcsd4sozx1lyl6

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