EUVD-2026-58504
GHSA-9x7q-v2pf-x72v
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
DNS rebinding requires attacker-controlled DNS returning different IPs per query (AC:H); PR:L for required builder auth; S:C because SSRF reaches services outside the Budibase security boundary.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
DNS rebinding SSRF in Budibase before 3.40.0 exposes internal HTTP services to authenticated builder-level users who can bypass the platform's outbound fetch blacklist protections. Two distinct code paths are exploitable: the OpenAPI query import feature performs a raw fetch independently of its DNS validation guard, and the REST datasource/query execution path uses an undici dispatcher that re-resolves hostnames at connection time, defeating the pinned Node agent passed to fetchWithBlacklist(). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated Budibase account with builder-level or higher privileges - specifically access to the OpenAPI query import endpoint or the REST datasource/query execution feature. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.4 reflects network-accessible exploitation (AV:N), low attacker privilege (PR:L - builder-level account), high confidentiality impact on both the vulnerable system (VC:H) and subsequent systems (SC:H, reflecting internal services reachable via SSRF), with low integrity impact and no availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker holding a Budibase builder-level account controls a DNS hostname configured to return 8.8.8.8 on the first resolution (passing the blacklist validation guard) and 127.0.0.1 on the second resolution (the actual HTTP connection). The attacker submits this hostname as an OpenAPI import URL or configures it as a REST datasource; Budibase validates against the public IP, then connects to the loopback address, returning responses from internal services such as local admin APIs or cloud instance metadata endpoints. … |
| Remediation | Upgrade Budibase to version 3.40.0 or later per the vendor advisory at https://github.com/Budibase/budibase/security/advisories/GHSA-xg5g-26x8-cvf4. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all Budibase deployments to identify current versions and inventory builder-level accounts; restrict new builder account creation pending patch deployment. …
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Same weakness CWE-918 – Server-Side Request Forgery (SSRF)
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External POC / Exploit Code
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