Budibase Server up to 3.44.x PWA Icon Upload Endpoint symlink

Summaryinfo

A vulnerability, which was classified as very critical, has been found in Budibase Server up to 3.44.x. This vulnerability affects unknown code of the component PWA Icon Upload Endpoint. This manipulation causes symlink. This vulnerability is tracked as CVE-2026-100682. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Budibase Server up to 3.44.x. It has been declared as very critical. Affected by this vulnerability is an unknown functionality of the component PWA Icon Upload Endpoint. The manipulation with an unknown input leads to a symlink vulnerability. The CWE definition for the vulnerability is CWE-61. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-100682 since 09/26/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/26/2026).

Upgrading to version 3.45.0 eliminates this vulnerability.

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Productinfo

Vendor

• Budibase

Name

• Server

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26
• 3.27
• 3.28
• 3.29
• 3.30
• 3.31
• 3.32
• 3.33
• 3.34
• 3.35
• 3.36
• 3.37
• 3.38
• 3.39
• 3.40
• 3.41
• 3.42
• 3.43
• 3.44

CPE 2.3info

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CPE 2.2info

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Entryinfo

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