Description
RustFS is a distributed object storage system built in Rust. In 1.0.0-beta.4, authenticated users with only PutObject permission on their own bucket can exploit a path traversal vulnerability in the Snowball auto-extract feature to write arbitrary objects into other users' buckets, completely breaking multi-tenant isolation. The vulnerability chains three flaws: No ../ sanitization in tar entry key normalization; IAM wildcard matching uses raw (uncleaned) paths; and Filesystem path cleaning resolves ../ across bucket boundaries.
Severity (CVSS)
| Base score | 8.6 |
|---|---|
| Severity | High |
| Version | CVSS 3.1 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N |
| Provided by | CNA |
Weaknesses
- CWE-22 — CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
- CWE-862 — CWE-862: Missing Authorization
Affected products
| Vendor | Product | Versions |
|---|---|---|
| rustfs | rustfs | 1.0.0-beta.4 |
References
- https://github.com/rustfs/rustfs/security/advisories/GHSA-f4vq-9ffr-m8m3 (x_refsource_CONFIRM)
Generated from the official CVE List on 27 Jun 2026 07:02 UTC.