# CVE-2026-100680: Budibase arbitrary local file read in OpenAPI import

Source: https://junglewise.ai/threats/cve-2026-100680-budibase-versions-before-3-45-0-fail-to-disable-external-json  
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-2026-100680 · Severity: high · CVSS 8.1 · Published 2026-09-26

Budibase, a low-code application platform, failed to properly disable external file resolution when validating OpenAPI/Swagger specifications, allowing authenticated users with builder privileges to read arbitrary files from the server. An attacker with builder access can craft a malicious API specification containing file:// references to extract sensitive data such as environment variables, JWT secrets, API keys, and database credentials, potentially compromising the entire deployment.

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

## Quick answers

**Is CVE-2026-100680 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-100680 being exploited in the wild.

**How severe is CVE-2026-100680?** High severity, with a CVSS score of 8.1, published 26 September 2026.

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

**Is there a fix for CVE-2026-100680?** A patch was published on 2026-09-10: Version 3.45.0 includes the fix Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-100680 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-100680?** 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 vulnerability exists in the OpenAPI import validator (POST /api/queries/import/info) where SwaggerParser.validate() is called without the resolve.external:false option, causing @apidevtools/swagger-parser to default to external=true and enable filesystem resolution. An authenticated builder can embed {"$ref":"file:///etc/passwd"} or similar file:// pointers in the OpenAPI spec to trigger arbitrary local file reads; file contents are returned in the import response or inlined during schema validation. The fix is a one-line change to pass the same resolve options to the validate function as the parse and dereference fallback functions already do.

## Affected products

- Budibase Budibase before 3.45.0

## Timeline

- 2026-09-26: disclosed
- 2026-09-10: patched: Version 3.45.0 includes the fix

## References

- [https://github.com/Budibase/budibase/security/advisories/GHSA-8xr5-pggf-26jq](https://github.com/Budibase/budibase/security/advisories/GHSA-8xr5-pggf-26jq)
- [https://www.vulncheck.com/advisories/budibase-before-3.45.0-arbitrary-local-file-read-via-openapi-import](https://www.vulncheck.com/advisories/budibase-before-3.45.0-arbitrary-local-file-read-via-openapi-import)

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