{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-40937","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-15T20:40:15.518Z","datePublished":"2026-04-22T20:15:57.266Z","dateUpdated":"2026-04-23T16:24:57.337Z"},"containers":{"cna":{"title":"RustFS missing admin authorization on notification target endpoints, which allows unauthenticated configuration of event webhooks","problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":8.3,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/rustfs/rustfs/security/advisories/GHSA-pfcq-4gjr-6gjm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/rustfs/rustfs/security/advisories/GHSA-pfcq-4gjr-6gjm"},{"name":"https://github.com/rustfs/rustfs/releases/tag/1.0.0-alpha.94","tags":["x_refsource_MISC"],"url":"https://github.com/rustfs/rustfs/releases/tag/1.0.0-alpha.94"}],"affected":[{"vendor":"rustfs","product":"rustfs","versions":[{"version":"< 1.0.0-alpha.94","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-04-22T20:15:57.266Z"},"descriptions":[{"lang":"en","value":"RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-alpha.94, all four notification target admin API endpoints in `rustfs/src/admin/handlers/event.rs` use a `check_permissions` helper that validates authentication only (access key + session token), without performing any admin-action authorization via `validate_admin_request`. Every other admin handler in the codebase correctly calls `validate_admin_request` with a specific `AdminAction`. This is the only admin handler file that skips authorization. A non-admin user can overwrite a shared admin-defined notification target by name, causing subsequent bucket events to be delivered to an attacker-controlled endpoint. This enables cross-user event interception and audit evasion. 1.0.0-alpha.94 contains a patch."}],"source":{"advisory":"GHSA-pfcq-4gjr-6gjm","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-23T13:41:06.202053Z","id":"CVE-2026-40937","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-23T16:24:57.337Z"}}]}}