Medium severity · published May 11, 2026
CVE-2026-42600
MinIO: Path Traversal via msgpack Body in `ReadMultiple` Storage-REST Endpoint
4.9
CVSS
8.7%
EPSS
No
On KEV
Description
MinIO is a high-performance object storage system. From RELEASE.2022-07-24T01-54-52Z to before RELEASE.2026-04-14T21-32-45Z, 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 RELEASE.2026-04-14T21-32-45Z.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)8.7% · higher than 95% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MI
minio · minio
>= RELEASE.2022-07-24T01-54-52Z, < RELEASE.2026-04-14T21-32-45Z · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42600
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42600
Mitigation
https://github.com/minio/minio/security/advisories/GHSA-xh8f-g2qw-gcm7
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