CVE-2026-52680 Apache Kyuubi: REST batch multipart upload path traversal allows controlled file write

What is CVE-2026-52680?

CVE-2026-52680 is a critical vulnerability in Apache Kyuubi, published on 30 Jul 2026.

Official description

Apache Kyuubi REST batch multipart upload handling uses the client-supplied multipart filename when creating a temporary uploaded resource. A remote attacker who can access the REST batch upload endpoint can provide path traversal sequences in the filename and cause the Kyuubi server process to write controlled content outside the intended upload directory, subject to filesystem permissions.

This issue affects Apache Kyuubi: from 1.7.0 through 1.11.1.

Users are recommended to upgrade to version 1.12.0, which fixes the issue.

Weakness: CWE-73, CWE-22

Which versions are affected by CVE-2026-52680?

It affects 1 product.

Products include Apache Kyuubi.

How do I fix CVE-2026-52680?

No fix has been published for CVE-2026-52680 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-52680 being exploited?

There is no known exploitation of CVE-2026-52680 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Other vulnerabilities in Apache Kyuubi

• CVE-2025-66518 Apache Kyuubi: Unauthorized directory access due to missing path normalization High 8.8
• CVE-2026-62391 Apache Kyuubi: kyuubi.session.local.dir.allow.list bypass via unprefixed Spark file-conf aliases High 8.1
• CVE-2026-23904 Apache Kyuubi: Unrestricted access via Kyuubi engine-ui proxy High 7.3

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-h9qj-gx4p-69cp.