Security Advisory

CVE-2026-73285

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-12 14:37:42

Last updated 2026-08-12 15:11:01

Assigner GitHub_M

CVSS score not scored

State PUBLISHED

Description

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.

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