# CVE-2026-100685: Budibase chat links cross-workspace information disclosure

Source: https://junglewise.ai/threats/cve-2026-100685-budibase-before-3-45-0-fails-to-properly-scope-the-get-api-chat  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-26. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-100685 · Severity: high · CVSS 7.7 · Published 2026-09-26

Budibase is a low-code platform for building web applications. The platform's chat integration feature failed to properly restrict access to chat identity link data by workspace, allowing a builder with access to a single workspace to retrieve sensitive linking information—including user IDs and external service identifiers—from other workspaces in the same tenant that they should not have access to.

Technologies: [Budibase](https://junglewise.ai/threats/technologies/budibase-budibase). Vendors: [Budibase](https://junglewise.ai/threats/vendors/budibase).

## Quick answers

**Is CVE-2026-100685 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-100685 being exploited in the wild.

**How severe is CVE-2026-100685?** High severity, with a CVSS score of 7.7, published 26 September 2026.

**Which products and versions are affected?** Budibase before 3.45.0.

**Is there a fix for CVE-2026-100685?** A patch was published on 2026-09-26: version 3.45.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-100685 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-100685?** Check whether you run Budibase 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 GET /api/chat-links endpoint is protected only by a builder-level auth check that validates the user is a builder in some workspace, but the handler returns all chat identity links for the entire tenant without filtering by the requesting user's workspace. The vulnerability exists in the listChatIdentityLinks SDK function, which queries by tenantId only and lacks a workspace boundary check. When both provider and agentId parameters are supplied, the endpoint correctly scopes results; the missing filter on the "no agentId given" branch is an authorization bypass (CWE-863).

## Affected products

- Budibase Budibase before 3.45.0

## Timeline

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

## References

- [https://github.com/Budibase/budibase/security/advisories/GHSA-76m3-47v8-p7h6](https://github.com/Budibase/budibase/security/advisories/GHSA-76m3-47v8-p7h6)
- [https://www.vulncheck.com/advisories/budibase-before-3.45.0-information-disclosure-via-chat-links](https://www.vulncheck.com/advisories/budibase-before-3.45.0-information-disclosure-via-chat-links)

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