CVE-2026-42600
MinIO: Path Traversal via msgpack Body in `ReadMultiple` Storage-REST Endpoint
Description
MinIO is a high-performance object storage system. From 2022.07.24 to before 2026.04.14, A path traversal vulnerability in MinIO's ReadMultiple internode storage-REST endpoint allows a caller holding the cluster root JWT to read files from outside the configured drive roots, bounded only by the MinIO process UID. The attacker sends POST minio/storage/{drivePath}/v63/rmpl with a msgpack-encoded body carrying ../ sequences in the Bucket field. The server opens the resulting path via os.OpenFile with O_RDONLY|O_NOATIME and returns its contents in the msgpack response stream. This vulnerability is fixed in 2026.04.14.
How to fix CVE-2026-42600
To remediate CVE-2026-42600, upgrade the affected package to a fixed version below.
- —no fix listed
- —upgrade to 0.0.0-20260414213245 or later
Is CVE-2026-42600 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 2022.07.24
- >= 0.0.0-20220724015452, < 0.0.0-20260414213245
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM4.9 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N |