Vulnerability Description
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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Budibase | Budibase | < 3.39.9 |
Related Weaknesses (CWE)
References
- https://github.com/Budibase/budibase/security/advisories/GHSA-gfq7-5x4g-3xhfExploitVendor Advisory
- https://github.com/Budibase/budibase/security/advisories/GHSA-gfq7-5x4g-3xhfExploitVendor Advisory
FAQ
What is CVE-2026-54353?
CVE-2026-54353 is a vulnerability with a CVSS score of 8.5 (HIGH). 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 valid...
How severe is CVE-2026-54353?
CVE-2026-54353 has been rated HIGH with a CVSS base score of 8.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-54353?
Check the references section above for vendor advisories and patch information. Affected products include: Budibase Budibase.