CVE-2026-45061
HighSummary
Budibase is an open-source low-code platform that prior to version 3.35.10 had a vulnerability in the URL validation for the plugin upload endpoint. The validation relied on a simple check for the presence of '.tar.gz', allowing for SSRF exploitation in specific scenarios.
Risk Assessment
This vulnerability could lead to SSRF attacks, posing a risk of accessing internal network resources of the organization. Specifically, it may allow attackers to redirect requests to internal servers.
Recommendation
It is recommended to update Budibase to version 3.35.10 to mitigate this vulnerability. Additionally, conducting a security audit to identify potential SSRF-related threats is advisable.
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Original NVD description (English source)
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.