Paper/Archive/CVE-2026-73407

CVE-2026-73407

Budibase budibase — Budibase: Unauthenticated REST Datasource Credential Theft via Cross-Origin Auth Leak (bypass of CVE-2026-48152))

EPSS 0.5%public exploit CVSS 9.0

critical.is priorityof 100

CVSS 9.0 (CNA)9.0 / 10 × 3027.0 Not in CISA KEV+300.0 EPSS percentile 45.5.455 × 209.1 Exploit: SSVC poc+1010.0 SSVC exploitation: poc+100.0

Description · from the CVE record

Budibase is an open-source low-code platform. Prior to 3.40.1, RestIntegration._req in packages/server/src/integrations/rest.ts attached credentials from getAuthHeaders and defaultHeaders without requiring the final request destination to match the datasource origin. An unauthenticated caller of a PUBLIC POST /api/v2/queries/:queryId query could supply an absolute or parameterized path to an attacker-controlled host and receive the stored bearer, basic, or static-header credentials. This issue is fixed in version 3.40.1.

Affected

ProductAffectedFixed inSource

budibase< 3.40.1–CNA

Scores by source

GitHub_M (CNA)9.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N

CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: partial

References

exploitgithub.com/Budibase/budibase/security/advisories/GHSA-mqhr-6j6h-74p5 refgithub.com/Budibase/budibase/pull/19239 refgithub.com/Budibase/budibase/commit/8b1bca71501b11c68310351ef4f2c3028b2d5f08 refgithub.com/Budibase/budibase/releases/tag/3.40.1