{"id":"CVE-2026-22043","aliases":["GHSA-xgr5-qc6w-vcg9"],"url":"https://o3.security/vulnerability/CVE-2026-22043","summary":"RustFS has IAM deny_only Short-Circuit that Allows Privilege Escalation via Service Account Minting","details":"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.","published":"2026-01-08T15:03:59.313Z","modified":"2026-08-07T11:31:16.762588061Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"rustfs","fixedVersion":"1.0.0-alpha.79"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22043.json"},{"type":"ADVISORY","url":"https://github.com/rustfs/rustfs/security/advisories/GHSA-xgr5-qc6w-vcg9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-22043"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:31:16.762588061Z"}}