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Vulnerability record · CVE-2026-72850 · published 13 August 2026

CVE-2026-72850: Path traversal vulnerability

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.

9.4 CVSS 4.0 Critical EPSS 0.61% · top 53.2% CWE-22 · Path traversal Deferred
9.4CVSS 4.0 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
31 Aug 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/Budibase/budibase/security/advisories/GHSA-pxwc-66g3-5f27
https://www.vulncheck.com/advisories/budibase-before-arbitrary-file-write-via-path-traversal
https://github.com/Budibase/budibase/security/advisories/GHSA-pxwc-66g3-5f27

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Source: NIST National Vulnerability Database (record CVE-2026-72850), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.