CVE-2026-49991
RustFS Snowball Auto-Extract: Path Traversal allows cross-bucket object injection
Vexday Risk Score
21Bajo
Decisión SSVC (CISA)
Track
Sin señal de explotación → monitorear
CVSS 8.6EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —
Ciclo de vida
26 jun 2026Publicada en NVD
Recomendación: Monitorear — sin señal de explotación por ahora.
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/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Productos afectados
rustfs · rustfs¿Quieres saber si tu infraestructura está expuesta a esto?
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