Is CVE-2026-100686 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-100686 being exploited in the wild.

How severe is CVE-2026-100686?

High severity, with a CVSS score of 8.1, published 26 September 2026.

Is there a fix for CVE-2026-100686?

A patch was published on 2026-09-26: patched in version 3.45.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-100686 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-100686?

Check whether you run Budibase Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-100686: Budibase cross-workspace privilege escalation in group apps endpoint

CVE-2026-100686 · Severity: high · CVSS 8.1 · Published 2026-09-26

Budibase is a low-code platform for building business applications. A builder in one workspace can exploit a missing authorization check in the user group management API to grant themselves admin roles in other workspaces they don't have access to, breaking isolation between separate workspace environments. This allows an attacker to access and potentially modify data in workspaces they should not be able to reach.

Technologies: Budibase Server. Vendors: Budibase.

Quick answers

Is CVE-2026-100686 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-100686 being exploited in the wild.
How severe is CVE-2026-100686?: High severity, with a CVSS score of 8.1, published 26 September 2026.
Which products and versions are affected?: Budibase Server before 3.45.0.
Is there a fix for CVE-2026-100686?: A patch was published on 2026-09-26: patched in version 3.45.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-100686 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-100686?: Check whether you run Budibase Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The POST /api/global/groups/:groupId/apps endpoint uses the weaker builderOrAdmin guard instead of adminOnly like other group mutation endpoints, and fails to validate that the caller is a builder of each target appId before writing role mappings. The builderOrAdmin middleware cannot determine workspace context from nested add[].appId in the request body, allowing a builder of any workspace to satisfy the authorization check while modifying roles in workspaces they don't build. Exploitation requires USER_GROUPS feature to be enabled (Team/Business/Enterprise tiers).

Affected products

Budibase Budibase Server before 3.45.0

Timeline

2026-09-26: disclosed
2026-09-26: patched: patched in version 3.45.0

References

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