CVE-2026-42600

MinIO: Path Traversal via msgpack Body in `ReadMultiple` Storage-REST Endpoint

State: Published
Severity: 6.9 Medium
Published: May 11, 2026
Updated: May 15, 2026
Reserved: Apr 29, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	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	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
miniominio	>= RELEASE.2022-07-24T01-54-52Z, < RELEASE.2026-04-14T21-32-45ZAffected

References

https://github.com/minio/minio/security/advisories/GHSA-xh8f-g2qw-gcm7

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