CVE-2026-54353
Budibase: Potential SSRF DNS rebinding bypass in outbound fetch validation
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.
INFO
Published Date :
June 26, 2026, 8:44 p.m.
Last Modified :
June 26, 2026, 8:44 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Affected Products
The following products are affected by CVE-2026-54353
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update Budibase to version 3.39.9 or later.
- Ensure outbound fetch validation includes socket connection IPs.
- Monitor outbound network connections for suspicious activity.
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CVE-2026-54353 vulnerability anywhere in the article.