CVE-2026-52680

CRITICAL
Published Jul 30, 2026 Modified Aug 5, 2026 CWE-22 CWE-73

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.

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CVSS v3.1 Score

9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0083
Probability of exploitation
0.55%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-22 Path Traversal
CWE-73 CWE-73

Affected Products

Vendor Product
apache kyuubi

References

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2026-52680? +
CVE-2026-52680 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0083, placing it in the 1th percentile for exploitation probability.
What products are affected by CVE-2026-52680? +
CVE-2026-52680 affects products from apache, specifically: kyuubi. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2026-52680? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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