CVE-2026-54353
CVE-2026-54353 · Budibase: Potential SSRF DNS rebinding bypass in outbound fetch validation
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 · High · EPSS 0.2% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
budibase
- Versions
- < 3.39.9: Affected
No fix published
@budibase/backend-core npm
- Affected ranges
- SEMVER: < 3.39.9
Update to 3.39.9