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      <title>CVE-2026-50136 — Budibase: Unauthenticated S3 signed upload URL generation allows arbitrary writes with stored datasource credentials</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-50136</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; budibase&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; budibase&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</content:encoded>
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