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"5821FADC-CF73-4639-911A-F3302D239B7C", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "RustFS is a distributed object storage system built in Rust. Prior to version 1.0.0-alpha.79, he `ImportIam` admin API validates permissions using `ExportIAMAction` instead of `ImportIAMAction`, allowing a principal with export-only IAM permissions to perform import operations. Since importing IAM data performs privileged write actions (creating/updating users, groups, policies, and service accounts), this can lead to unauthorized IAM modification and privilege escalation. Version 1.0.0-alpha.79 fixes the issue."}], "id": "CVE-2026-22042", "lastModified": "2026-01-15T21:11:34.373", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "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:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.7, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-01-08T15:15:45.443", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/rustfs/rustfs/security/advisories/GHSA-vcwh-pff9-64cc"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/rustfs/rustfs/security/advisories/GHSA-vcwh-pff9-64cc"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-285"}, {"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-863"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-18T07:40:07.630822+00:00", "value": {"mitigation_remediation": ["Upgrade RustFS to version 1.0.0\u2011alpha.79 or later, which corrects the ImportIAM permission check.", "Audit current IAM roles and revoke any export\u2011only permissions that are not strictly required.", "Restrict the use of the ImportIam API to administrators with full IAM privileges and monitor for unexpected import activity."], "summary": {"action": "Apply Patch", "impact": "Privilege Escalation via IAM based on incorrect authorization"}, "threat_synthesis": {"affected_systems": "All RustFS releases prior to version 1.0.0\u2011alpha.79 are impacted. The affected versions include the extensive list of alpha releases from alpha1 through alpha78 referenced by the CPE strings, representing the RustFS product from the rustfs vendor. Any deployment of these pre\u201179 alpha releases that exposes the ImportIam API and grants export\u2011only IAM permissions to a principal is vulnerable.", "description_and_impact": "RustFS, a Rust\u2011based distributed object storage system, has a bug in the ImportIam administrative API that incorrectly validates permissions by checking for ExportIAMAction instead of ImportIAMAction. Because ImportIam performs privileged write operations\u2014creating or updating users, groups, policies, and service accounts\u2014an attacker who has only export\u2011only IAM permissions can perform an import operation. This allows unauthorized modification of IAM configuration and results in privilege escalation. The flaw is an example of improper authorization (CWE\u2011285) compounded with a use of a wrong action constant (CWE\u2011863).", "risk_and_exploitability": "The CVSS score of 5.7 indicates moderate severity, but the EPSS score of less than 1% shows a very low likelihood of exploitation at the time of analysis. The vulnerability is not listed in the CISA KEV catalog. An attacker must first authenticate to a RustFS instance and possess export\u2011only IAM rights, then invoke the ImportIam endpoint; no special network permissions are required beyond those needed to access the API. Because the attack requires valid credentials and specific IAM permissions, the risk to an organization depends on how those export\u2011only permissions are delegated, but the capability to create or modify IAM entities represents a significant privilege escalation end state."}}}}, "created": "2026-01-09T13:24:56.316073+00:00", "updated": "2026-04-18T07:45:24.981805+00:00", "vendors": ["rustfs", "rustfs$PRODUCT$rustfs"]}