CVE-2026-72855 Budibase before 3.40.0 DNS Rebinding SSRF via OpenAPI and REST
Authenticated users can bypass DNS pinning via rebinding to access internal services, requiring an upgrade to Budibase.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-72855?
CVE-2026-72855 is a high-severity server-side request forgery vulnerability in budibase server, published on 13 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Budibase before 3.40.0 contains server-side request forgery vulnerabilities in OpenAPI query import and REST query execution that allow authenticated builder-level users to bypass DNS pinning protections through DNS rebinding attacks. Attackers can configure hostnames that resolve to public addresses during validation but resolve to loopback or private addresses during actual connection, allowing access to blocked internal HTTP services.
Weakness: CWE-918
Which versions are affected by CVE-2026-72855?
2 open source packages ship an affected version, including @budibase/server.
| Package | Affected | Fixed in |
|---|---|---|
@budibase/server npm | All versions to 3.38.1 | None |
@budibase/server npm | All versions to 3.38.1 | None |
How do I fix CVE-2026-72855?
No fix has been published for CVE-2026-72855 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-72855 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-72855 exists.
Sources
Also known as GHSA-9x7q-v2pf-x72v, GHSA-xg5g-26x8-cvf4.