{"id":"CVE-2026-82241","state":"PUBLISHED","title":"Budibase backend-core SSRF via incomplete default blacklist","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.","publishedAt":"2026-08-28T10:49:29.355Z","updatedAt":"2026-10-08T15:25:24.916Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["budibase server"],"affected":[{"vendor":"budibase","product":"server","packageURL":"pkg:npm/%40budibase/server","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.41.3","versionType":"semver"},{"version":"3.41.3","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/Budibase/budibase/security/advisories/GHSA-9754-4wm6-3c8r","https://www.vulncheck.com/advisories/budibase-backend-core-ssrf-via-incomplete-default-blacklist"],"weaknesses":["CWE-918"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/82xxx/CVE-2026-82241.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-82241","state":"PUBLISHED","datePublished":"2026-08-28T10:49:29.355Z","dateUpdated":"2026-10-08T15:25:24.916Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-08-28T10:37:04.621Z"},"containers":{"cna":{"title":"Budibase backend-core SSRF via incomplete default blacklist","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"budibase","product":"server","packageURL":"pkg:npm/%40budibase/server","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.41.3","versionType":"semver"},{"version":"3.41.3","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/Budibase/budibase/security/advisories/GHSA-9754-4wm6-3c8r","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-9754-4wm6-3c8r)"},{"url":"https://www.vulncheck.com/advisories/budibase-backend-core-ssrf-via-incomplete-default-blacklist","name":"VulnCheck Advisory: Budibase backend-core SSRF via incomplete default blacklist","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-08T15:25:24.916Z"},"datePublic":"2026-08-14T00:00:00.000Z","credits":[{"lang":"en","value":"sec-reex","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-28T14:46:47.075515Z","id":"CVE-2026-82241","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-28T14:46:56.389Z"}}]}}}