CVE-2026-45061

The record

Budibase is an open-source low-code platform. Prior to 3.35.10, the Plugin URL upload endpoint (POST /api/plugin) validates the submitted URL with a single substring check: url.includes(".tar.gz"). Any URL containing .tar.gz anywhere in the string — in the path, query string, or fragment — passes this check. The URL then proceeds directly to fetchWithBlacklist() with no further validation of host, scheme, or path. Standalone, this vulnerability is blocked by Budibase's default SSRF blacklist, which covers private IP ranges. But the URL validation layer itself is broken regardless, and it directly enables SSRF in two realistic situations: (1) when chained with the BLACKLIST_IPS bypass ([001]), where the blacklist is empty; and (2) when the plugin server follows HTTP redirects from an external URL to an internal target (the default node-fetch behavior with redirect: 'follow'). This vulnerability is fixed in 3.35.10.

Affected packages

Related vulnerabilities

• GHSA-xh5j-727m-w6gg Budibase vulnerable to SSRF via trivial `.tar.gz` substring bypass in Plugin URL upload… Same vulnerability
• GHSA-qqf5-x7mj-v43p budibase: Database Connector SQL Injections in PostgreSQL, MS SQL, and MySQL Also affects budibase
• GHSA-6964-pp88-6wp9 Budibase: SSRF via User-Controlled queryId in Automation Execute Query Step Also affects budibase
• CVE-2026-46426 Budibase is an open-source low-code platform. Also affects budibase
• CVE-2026-48128 Budibase is an open-source low-code platform. Also affects budibase
• CVE-2026-45718 Budibase is an open-source low-code platform. Also affects budibase
• GHSA-82rc-gxrg-v4gf Budibase: Unrestricted Upload of File with Dangerous Type Also affects budibase
• GHSA-3263-v5v9-xq8q Budibase: Row Action Trigger Bypasses View Row Filter Security Boundary Allowing Action… Also affects budibase