CVE WatchAug 28, 2026

CVE-2026-82241

Budibase backend-core (@budibase/backend-core, as used by @budibase/server) omits the shared address space range 100.64.0.0/10 from its defa

CVSS

7.1

High

EPSS

0.2%

KEV

—

Exploit Today

0-100

Published: Aug 28, 2026 · Last modified: Aug 28, 2026 · CWE-918

EPSS · 30d

0.2%EPSS · 30 days0.2%

2026-08-292026-08-30

Technical description

Budibase backend-core (@budibase/backend-core, as used by @budibase/server) omits the shared address space range 100.64.0.0/10 from its default SSRF blacklist (DEFAULT_BLACKLIST) used by REST datasource query previews. When the default blacklist is active (i.e., a self-hosted deployment has not defined BLACKLIST_IPS), an authenticated user with the Builder permission can submit a REST datasource query preview request to POST /api/queries/preview targeting a reachable HTTP(S) service in the 100.64.0.0/10 range, causing the server to send a request to that target and return its response through the preview flow. Per the advisory, no released fix was identified at the time of publication; remediation is to add 100.64.0.0/10 to DEFAULT_BLACKLIST.

Official references

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