Vulnerability · Published Aug 13, 2026 · Assigned by VulnCheck
CVE-2026-72850Budibase before 3.40.0 Arbitrary File Write via Path Traversal
Critical 9.1
In plain English
A critical-severity path traversal in server from budibase. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities).
Severity (CVSS 3.1)9.1Critical
Exploit odds (30 days)0.5%top 55.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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 (as reported)
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
References
- GitHub Security Advisory (GHSA-pxwc-66g3-5f27) vendor-advisory
- VulnCheck Advisory: Budibase before 3.40.0 Arbitrary File Write via Path Traversal third-party-advisory