Vulnerability · Published May 11, 2026 · Assigned by GitHub_M

CVE-2026-42600MinIO: Path Traversal via msgpack Body in `ReadMultiple` Storage-REST Endpoint

Medium 6.9

In plain English

A medium-severity path traversal in minio from minio. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 8.7% (higher than 95% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.9Medium

Exploit odds (30 days)8.7%top 4.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/minio/minio	0.0.0-20260414213245	GHSA-xh8f-g2qw-gcm7
Go	github.com/minio/minio	no fix listed	GO-2026-5757

Affected products (as reported)

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

Weakness: CWE-22 · Vector: 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

References

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