# CVE-2026-52680: Apache Kyuubi path traversal in REST batch multipart upload

Source: https://junglewise.ai/threats/cve-2026-52680-apache-kyuubi-path-traversal-in-rest-batch-multipart-upload  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-30. Updated: 2026-07-30  
License: CC BY 4.0 with a link back

CVE-2026-52680 · Severity: info · CVSS 0 · Published 2026-07-30

Apache Kyuubi, a distributed multi-tenant gateway for data processing engines, contains a vulnerability in how it handles file uploads. An attacker with access to the batch upload interface can use specially crafted filenames to save files in unauthorized locations on the server's filesystem. This could allow an attacker to overwrite sensitive system files or plant malicious data, potentially disrupting operations or compromising the server's integrity.

Technologies: [Apache Software Foundation Kyuubi](https://junglewise.ai/threats/technologies/kyuubi). Vendors: [Apache Software Foundation](https://junglewise.ai/threats/vendors/apache-software-foundation).

## Quick answers

**Is CVE-2026-52680 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-52680 being exploited in the wild.

**How severe is CVE-2026-52680?** Informational severity, with a CVSS score of 0, published 30 July 2026.

**Which products and versions are affected?** Apache Software Foundation Kyuubi 1.7.0 through 1.11.1.

**Is there a fix for CVE-2026-52680?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-52680 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-52680?** Check whether you run Apache Software Foundation Kyuubi at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A path traversal vulnerability exists in Apache Kyuubi's REST batch multipart upload endpoint. The application fails to properly sanitize client-supplied filenames when creating temporary uploaded resources, allowing the use of traversal sequences (e.g., ../). A remote attacker with access to the REST batch upload endpoint can exploit this to write arbitrary content to locations outside the designated upload directory, constrained only by the filesystem permissions of the Kyuubi server process. The issue is resolved in version 1.12.0.

## Affected products

- Apache Kyuubi 1.7.0 through 1.11.1

## Timeline

- 2026-07-30: disclosed: Public advisory released by Apache Software Foundation
- 2026-07-30: advisory: NVD publication date

## References

- [https://repo.maven.apache.org/maven2](https://repo.maven.apache.org/maven2)
- [https://lists.apache.org/thread/b0qx2v8k5v4rrqsh53pb146t7so0lmrk](https://lists.apache.org/thread/b0qx2v8k5v4rrqsh53pb146t7so0lmrk)
- [http://www.openwall.com/lists/oss-security/2026/07/30/5](http://www.openwall.com/lists/oss-security/2026/07/30/5)

## Related threats

- [Apache Kyuubi path traversal via Spark config alias bypass](https://junglewise.ai/threats/cve-2026-62391-apache-kyuubi-path-traversal-via-spark-config-alias-bypass)
- [Apache Kyuubi SSRF in Engine UI proxy](https://junglewise.ai/threats/cve-2026-23904-apache-kyuubi-ssrf-in-engine-ui-proxy)