CVE-2026-31816
CRITICALCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Lifecycle Timeline
3Description
Budibase is a low code platform for creating internal tools, workflows, and admin panels. In 3.31.4 and earlier, the Budibase server's authorized() middleware that protects every server-side API endpoint can be completely bypassed by appending a webhook path pattern to the query string of any request. The isWebhookEndpoint() function uses an unanchored regex that tests against ctx.request.url, which in Koa includes the full URL with query parameters. When the regex matches, the authorized() middleware immediately calls return next(), skipping all authentication, authorization, role checks, and CSRF protection. This means a completely unauthenticated, remote attacker can access any server-side API endpoint by simply appending ?/webhooks/trigger (or any webhook pattern variant) to the URL.
Analysis
Authorization bypass in Budibase 3.31.4 and earlier. The authorized() middleware can be bypassed, enabling injection attacks. …
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Remediation
Within 24 hours: Inventory all Budibase instances in your environment and assess their criticality and data exposure; isolate critical instances from production networks if possible. Within 7 days: Implement network segmentation to restrict Budibase access, enable enhanced logging/monitoring, and contact Budibase vendor for patch timeline or security guidance. …
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External POC / Exploit Code
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