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// vulnerability record
cached · NVD via COSMOS syncCVE-2026-49991
HIGHpublished 2026-06-26 20:17 UTC · 2 days ago · modified 2026-06-26 20:20 UTC
8.6
CVSS / 10
// 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.
// cvss 3.1 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
// weaknesses (CWE)
- CWE-22
- CWE-862