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Critical · 9.1 CVE-2026-72850 EUVD-2026-58501GHSA-ccjw-whgg-h4gh

Budibase before 3.40.0 Arbitrary File Write via Path Traversal

Published Aug 13, 2026 · Updated Oct 8, 2026 · Assigned by VulnCheck

Description

Budibase before 3.40.0 fails to properly sanitize S3 object keys, allowing authenticated builders to upload files with traversal sequences that are preserved during export. Attackers can craft filenames containing .. segments that escape the temporary directory during workspace export, writing arbitrary content to any path writable by the Budibase process.

Affected products

VendorProductAffectedFixed
budibase server < 3.40.0 3.40.0

References