{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-22043","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-01-05T22:30:38.720Z","datePublished":"2026-01-08T15:03:59.313Z","dateUpdated":"2026-01-08T15:54:47.243Z"},"containers":{"cna":{"title":"RustFS has IAM deny_only Short-Circuit that Allows Privilege Escalation via Service Account Minting","problemTypes":[{"descriptions":[{"cweId":"CWE-269","lang":"en","description":"CWE-269: Improper Privilege Management","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-284","lang":"en","description":"CWE-284: Improper Access Control","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":5.7,"baseSeverity":"MEDIUM","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","version":"4.0"}}],"references":[{"name":"https://github.com/rustfs/rustfs/security/advisories/GHSA-xgr5-qc6w-vcg9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/rustfs/rustfs/security/advisories/GHSA-xgr5-qc6w-vcg9"}],"affected":[{"vendor":"rustfs","product":"rustfs","versions":[{"version":">= 1.0.0-alpha.13, < 1.0.0-alpha.79","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-01-08T15:03:59.313Z"},"descriptions":[{"lang":"en","value":"RustFS is a distributed object storage system built in Rust. In versions 1.0.0-alpha.13 through 1.0.0-alpha.78, a flawed `deny_only` short-circuit in RustFS IAM allows a restricted service account or STS credential to self-issue an unrestricted service account, inheriting the parent’s full privileges. This enables privilege escalation and bypass of session/inline policy restrictions. Version 1.0.0-alpha.79 fixes the issue."}],"source":{"advisory":"GHSA-xgr5-qc6w-vcg9","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/rustfs/rustfs/security/advisories/GHSA-xgr5-qc6w-vcg9","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-08T15:50:39.622470Z","id":"CVE-2026-22043","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-01-08T15:54:47.243Z"}}]}}