CVE-2026-54353
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.
- Score
- CVSS 3.1 8.5 High
- Status
- Analyzed - security-advisories@github.com
- Published
- 2026-06-26
- Last modified
- 2026-06-29
- Weaknesses
- CWE-367, CWE-918
Affected products
References
- https://github.com/Budibase/budibase/security/advisories/GHSA-gfq7-5x4g-3xhf
