# CVE-2026-100686: Budibase before 3.45.0 Cross-Workspace Privilege Escalation via POST /api/global/groups/:groupId/apps

> Attackers can escalate privileges to admin in other workspaces by exploiting missing authorization checks in the group assignment API.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Sep 2026
- **Updated:** 8 Oct 2026
- **Also known as:** GHSA-9mjc-4gf6-xhx7, GHSA-pp5r-q4fp-mcj3

## What is CVE-2026-100686?

CVE-2026-100686 is a high-severity vulnerability in budibase server, published on 26 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Budibase versions before 3.45.0 fail to validate per-app authorization in the POST /api/global/groups/:groupId/apps endpoint, allowing builders to assign application roles across workspace boundaries. A builder of a single workspace can exploit missing per-app authorization checks to grant themselves admin roles in other workspaces by modifying user group role mappings.

Weakness: CWE-269 (Improper Privilege Management)

## Which versions are affected by CVE-2026-100686?


## How do I fix CVE-2026-100686?

No fix has been published for CVE-2026-100686 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-100686 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100686 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-100686 and fix it if it is affected.

What it is: CVE-2026-100686 is a high-severity vulnerability in budibase server, published on 26 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100686 exists.

Affected product: budibase server. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-100686/ (Markdown: https://insights.sbomify.com/CVE-2026-100686/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-100686
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-100686
- OSV: https://osv.dev/vulnerability/CVE-2026-100686

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-100686/
Summaries are generated and may contain mistakes; the official description above is the record.