{"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": "2026-04-22T20:15:57.266Z"}, "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-40937", "lastModified": "2026-04-22T21:23:52.620", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 5.5, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-22T21:17:08.877", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/rustfs/rustfs/releases/tag/1.0.0-alpha.94"}, {"source": "security-advisories@github.com", "url": "https://github.com/rustfs/rustfs/security/advisories/GHSA-pfcq-4gjr-6gjm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.0.0-alpha.94)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "rustfs", "source": "cna", "vendor": "rustfs"}, "product": "rustfs", "vendor": "rustfs"}], "created": "2026-04-22T21:30:27.595343+00:00", "updated": "2026-04-22T21:30:27.595418+00:00", "vendors": ["rustfs", "rustfs$PRODUCT$rustfs"]}