{"id":"CVE-2026-82241","title":"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","summary":"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 b…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","cwe":["CWE-918"],"vendor":"budibase","product":"server","affected":["server < 3.41.3"],"published":"2026-08-28","updated":"2026-10-08","sourceUpdated":"2026-10-08T16:17:47.040","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-82241","references":[{"url":"https://github.com/Budibase/budibase/security/advisories/GHSA-9754-4wm6-3c8r","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/budibase-backend-core-ssrf-via-incomplete-default-blacklist","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-08-28T14:46:47.075515Z"},"epss":0.00301,"epssPercentile":0.20942,"ingestedAt":"2026-10-08T16:52:14.732Z","slug":"CVE-2026-82241","body":"## Overview\n\nBudibase 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}