Vulnerability · Published Sep 26, 2026 · Assigned by VulnCheck
CVE-2026-100682Budibase Server before 3.45.0 Arbitrary File Write via ZIP Symlink
High 8.8
In plain English
A high-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 0.7% (higher than 54% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.7%top 45.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Budibase Server before 3.45.0 contains an arbitrary file write vulnerability in the PWA icon upload endpoint that extracts user-supplied ZIP archives without proper symlink validation. Attackers with BUILDER role can craft a malicious ZIP with leaf symlink entries followed by duplicate file entries to write arbitrary files as root, enabling remote code execution.
Affected products (as reported)
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- GitHub Security Advisory (GHSA-37r6-5jxh-vm83) vendor-advisory
- VulnCheck Advisory: Budibase Server before 3.45.0 Arbitrary File Write via ZIP Symlink third-party-advisory