---
title: "CVE-2026-100682: Budibase Server - Unrestricted File Upload"
description: "Budibase Server < 3.45.0 contains an arbitrary file write vulnerability caused by improper symlink validation in the PWA icon upload endpoint, letting attackers with BUILDER role write arbitrary files as root, enabling remote code execution."
url: https://panop.io/threat-heartbeat/CVE-2026-100682/
---

# CVE-2026-100682 Budibase Server - Unrestricted File Upload

Budibase Server < 3.45.0 contains an arbitrary file write vulnerability caused by improper symlink validation in the PWA icon upload endpoint, letting attackers with BUILDER role write arbitrary files as root, enabling remote code execution.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.57% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-100682)

## Details

Type

Unrestricted File Upload

Impact

Remote Code Execution, File System Write

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

26 September 2026

Updated

15 October 2026

Weakness

[CWE-22](https://cwe.mitre.org/data/definitions/22.html)

## Vendor fix

Upgrade to version 3.45.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-100682](https://nvd.nist.gov/vuln/detail/CVE-2026-100682)
- [https://github.com/Budibase/budibase/security/advisories/GHSA-37r6-5jxh-vm83](https://github.com/Budibase/budibase/security/advisories/GHSA-37r6-5jxh-vm83)
- [https://www.vulncheck.com/advisories/budibase-server-before-3.45.0-arbitrary-file-write-via-zip-symlink](https://www.vulncheck.com/advisories/budibase-server-before-3.45.0-arbitrary-file-write-via-zip-symlink)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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