Path Traversal in Apache Kyuubi
CVE-2026-52680
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.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.008 (55.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Apache Kyuubi
- Apache Software Foundation Kyuubi — versions 1.7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-52680?
- CVE-2026-52680 is a critical-severity vulnerability in Apache Kyuubi, classified under Path Traversal. CVSS score: 9.8/10. Published 2026-07-30.
- How severe is CVE-2026-52680?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2026-52680 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.