What’s Vulnerable › Vulnerabilities

CVE-2026-73407: Budibase: Unauthenticated REST Datasource Credential Theft via Cross-Origin Auth Leak (bypass of CVE-2026-48152))

• Severity: critical (CVSS 9.0 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-12 · updated 2026-09-08
• Weakness: CWE-22

Description

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 products

• budibase: before 3.40.1

References

• https://github.com/Budibase/budibase/commit/8b1bca71501b11c68310351ef4f2c3028b2d5f08
• https://github.com/Budibase/budibase/pull/19239
• https://github.com/Budibase/budibase/releases/tag/3.40.1
• https://github.com/Budibase/budibase/security/advisories/GHSA-mqhr-6j6h-74p5
• https://github.com/Budibase/budibase/security/advisories/GHSA-mqhr-6j6h-74p5

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