{"id":"CVE-2026-73285","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-73285","summary":"RustFS is a distributed object storage system built in Rust. From 1.0.0-alpha.64 until 1.0.0-rc.1, RustFS external OPA authorization enabled by RUSTFS_POLICY_PLUGIN_URL in crates/iam/src/sys.rs…","details":"RustFS is a distributed object storage system built in Rust. From 1.0.0-alpha.64 until 1.0.0-rc.1, RustFS external OPA authorization enabled by RUSTFS_POLICY_PLUGIN_URL in crates/iam/src/sys.rs sets PreparedIamAuth.needs_existing_object_tag incorrectly for PreparedIamMode::Opa, causing maybe_merge_object_tag_conditions to omit s3:ExistingObjectTag/* values and allowing authenticated users to bypass tag-based policy restrictions. This issue is fixed in version 1.0.0-rc.1.","published":"2026-08-12T15:18:31.840","modified":"2026-08-12T15:18:31.840","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/rustfs/rustfs/commit/98d3619613722308498494d412797a52ea8ae64d","label":"rustfs/rustfs@98d3619"},"references":[{"type":"WEB","url":"https://github.com/rustfs/rustfs/blob/380ed40b471887014fe21d069b61df9eacca074b/.agents/skills/security-advisory-lessons/references/advisory-patterns.md?plain=1#L47"},{"type":"WEB","url":"https://github.com/rustfs/rustfs/commit/98d3619613722308498494d412797a52ea8ae64d"},{"type":"WEB","url":"https://github.com/rustfs/rustfs/releases/tag/1.0.0-rc.1"},{"type":"WEB","url":"https://github.com/rustfs/rustfs/security/advisories/GHSA-5w8r-p896-6vq2"},{"type":"WEB","url":"https://github.com/rustfs/rustfs/security/advisories/GHSA-5w8r-p896-6vq2"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T15:18:31.840"}}