Improper access control in Apache Polaris - CVE-2026-42809
Published: August 25, 2026
Vulnerability identifier: #VU145298
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-42809
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to obtain broad temporary storage credentials for an attacker-chosen location.
The vulnerability exists due to improper access control in the staged table creation flow when processing a stage-create request with a custom location or location override properties before the location is validated. A remote user can submit a specially crafted stage-create request to obtain broad temporary storage credentials for an attacker-chosen location.
The issue affects credential vending during staged table creation and also involves the use of write.data.path and write.metadata.path as attacker-influenced location inputs.
Affected software
Apache Polaris
How to mitigate CVE-2026-42809
Install security update from vendor's website.
Apache Polaris - update to 1.4.1