NPM · JUNE 2026 · EARLY WARNING

Budibase Server Vulnerability: Arbitrary File Read via PWA Zip Upload

EARLY WARNING · UNCONFIRMED. This page describes a developing threat that 0Day surfaced from early signals and has not yet independently confirmed. Details may change. Always verify against the primary sources before acting.
Severity
HIGH
Affected component
@budibase/server (npm)
Affected versions
< 3.33.4 or <= 3.38.1 or < 3.39.0 or < 3.38.1 or < 3.39.0 or < 3.38.1 or < 2.20.0 or < 3.39.0 or <= 3.38.1 or < 3.39.0 or < 3.23.32 or < 3.39.12 or <= 3.38.1 or <= 3.38.1 or < 3.35.3 or < 3.33.4 or < 3.39.25 or < 3.38.1 or < 3.39.0 or <= 3.38.1 or < 3.33.4 or <= 3.38.1 or <= 3.38.1 or <= 3.38.1 or <= 3.38.1 or < 3.39.2 or <= 3.38.1 or <= 3.38.1 or <= 3.38.1 or <= 3.38.1 or <= 3.38.1 or < 3.39.0 or <= 3.38.1 or < 3.39.9 or < 3.34.8 or <= 3.38.1 or < 3.39.0 or < 3.39.9 or <= 3.38.1 or <= 3.38.1
Patched version
Not yet available
GHSA-W7MQ-R738-X278

An early warning has been issued for a high-severity vulnerability in the Budibase server. This vulnerability, tracked as GHSA-W7MQ-R738-X278, allows arbitrary file read via a crafted PWA zip upload.

What happened

The Budibase server reportedly allows arbitrary file read via a crafted PWA zip upload. This vulnerability enables access to sensitive files such as /data/.env. The issue is under investigation and has not yet been exploited in the wild. The affected component is @budibase/server (npm) with various version ranges identified as vulnerable.

Users of Budibase server are advised to review the affected version ranges and upgrade to a version that fixes this vulnerability. Additionally, access controls for the workspace-builder permission should be reviewed to mitigate potential risks.

What to do about it

How 0Day would have caught this

MATCHED TO YOUR ACTUAL DEPENDENCY GRAPH0Day matches every incoming threat signal against your GitHub organization’s full dependency graph, including transitive dependencies. If @budibase/server is anywhere in your dependency tree, the engineers who own the affected repositories get a push alert the moment it is flagged — no manual audit to remember to run.

Read how this differs from waiting on a scanner to catch a known advisory, or see the exact, read-only access 0Day needs to do this for an organization.

Frequently asked questions

Am I affected?

You are affected if you are using @budibase/server (npm) with versions less than 3.33.4, 3.38.1, 3.39.0, 3.23.32, 3.39.12, 3.35.3, 3.39.25, 3.39.2, 3.39.9, 3.34.8, or 3.39.0.

What should I do right now?

Upgrade to a version of Budibase server that fixes this vulnerability and review access controls for the workspace-builder permission.

Is there an official fix available?

No official fix has been published yet. Monitor the primary sources for updates.

Sources

Join the 0Day waitlist →

← Back to all threats