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.
Metrics
Affected Vendors & Products
References
History
Thu, 28 May 2026 16:30:00 +0000
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ssvc
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Thu, 28 May 2026 03:45:00 +0000
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Budibase
Budibase budibase |
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Budibase
Budibase budibase |
Wed, 27 May 2026 17:45:00 +0000
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| Description | 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. | |
| Title | Budibase: SSRF via trivial `.tar.gz` substring bypass in Plugin URL upload (`/api/plugin`) | |
| Weaknesses | CWE-918 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-05-27T16:50:57.549Z
Updated: 2026-05-28T14:58:59.523Z
Reserved: 2026-05-08T18:45:10.095Z
Link: CVE-2026-45061
Updated: 2026-05-28T14:58:55.216Z
Status : Deferred
Published: 2026-05-27T18:16:24.293
Modified: 2026-05-28T16:16:26.010
Link: CVE-2026-45061
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