High severity7.4NVD Advisory· Published Jun 26, 2026· Updated Jun 30, 2026
CVE-2026-50136
CVE-2026-50136
Description
Budibase is an open-source low-code platform. Prior to 3.39.3, the application server exposes an unauthenticated endpoint that generates S3 PutObject presigned URLs using credentials stored in a workspace datasource. The route is protected only by the recaptcha middleware and does not require authentication, table permission, datasource permission, or builder access. A public caller who knows a workspace ID and S3 datasource ID can request a signed upload URL for attacker-controlled bucket and key values. This vulnerability is fixed in 3.39.3.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
@budibase/servernpm | < 3.39.2 | 3.39.2 |
Affected products
2Patches
Vulnerability mechanics
References
5- github.com/Budibase/budibase/security/advisories/GHSA-jj36-r9w3-3pfhnvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-jj36-r9w3-3pfhghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-50136ghsaADVISORY
- github.com/Budibase/budibase/commit/d9dbb7f6105373cc88ecacdbcab70c776f7dd6a1ghsaWEB
- github.com/Budibase/budibase/pull/18774ghsaWEB
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