Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/rustfs/rustfs/blob/380ed40b471887014fe21d069b61df9eacca074b/.
- https://github.com/rustfs/rustfs/commit/98d3619613722308498494d412797a52ea8ae64d
- https://github.com/rustfs/rustfs/releases/tag/1.0.0-rc.1
- https://github.com/rustfs/rustfs/security/advisories/GHSA-5w8r-p896-6vq2
- https://github.com/rustfs/rustfs/security/advisories/GHSA-5w8r-p896-6vq2
FAQ
What is CVE-2026-73285?
CVE-2026-73285 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 P...
How severe is CVE-2026-73285?
CVE-2026-73285 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-73285?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.