Vulnerability · Published Aug 13, 2026 · Assigned by VulnCheck

CVE-2026-72855Budibase before 3.40.0 DNS Rebinding SSRF via OpenAPI and REST

High 8.5

In plain English

A high-severity server-side request forgery in server from budibase. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).

Severity (CVSS 3.1)8.5High

Exploit odds (30 days)0.4%top 68.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@budibase/server	no fix listed	GHSA-xg5g-26x8-cvf4

Affected products (as reported)

Vendor	Product	Versions
budibase	server	0 – before 3.40.0

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

References

GitHub Security Advisory (GHSA-xg5g-26x8-cvf4) vendor-advisory
VulnCheck Advisory: Budibase before 3.40.0 DNS Rebinding SSRF via OpenAPI and REST third-party-advisory