CVE-2026-54353

CVE-2026-54353 · Budibase: Potential SSRF DNS rebinding bypass in outbound fetch validation

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Budibase is an open-source low-code platform. Prior to 3.39.9, authenticated users with automation permissions can bypass Budibase's SSRF blacklist through DNS rebinding. The outbound fetch flow validates a hostname against the blacklist before the request is sent, but the actual socket connection later performs a separate DNS lookup through node-fetch. Since the validated IPs are never pinned to the connection, an attacker-controlled hostname can return a public IP during validation and a private/internal IP during the real connection. This results in a non-blind SSRF primitive against internal services reachable from the Budibase host, including loopback, RFC1918 ranges, and cloud metadata endpoints. This vulnerability is fixed in 3.39.9.

CVSS 8.5 · Élevée · EPSS 0,2% · Correctif disponible

Publication

2026-06-26T20:44:52.069Z

Mise à jour

2026-06-29T13:17:32.753Z

Pile logicielle: node

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