MinIO vulnerabilities
We track 17 vulnerabilities in MinIO products across 2 products. 17 are rated high or critical, and 2 have been exploited in real attacks. The most recent was published on September 25, 2026.
Latest MinIO vulnerabilities
- 7.1 High severity
MinIO: Improper Verification of Cryptographic Signature
MinIO through 7aac2a2 does not verify that every x-amz-* header present on a request also appears in the client-supplied X-Amz-SignedHeaders list. extractSignedHeaders() in cmd/signature-v4-utils.go iterates only the claimed list and never enumerates the heade
- 8.2 High severity
minio: Improper Authentication
MinIO is a high-performance object storage system. Starting in RELEASE.2023-05-18T00-05-36Z and prior to RELEASE.2026-04-11T03-20-12Z, an authentication bypass vulnerability in MinIO's `STREAMING-UNSIGNED-PAYLOAD-TRAILER` code path allows any user who knows a
- 8.2 High severity
minio: Improper Authentication
MinIO is a high-performance object storage system. Starting in RELEASE.2023-05-18T00-05-36Z and prior to RELEASE.2026-04-11T03-20-12Z, an authentication bypass vulnerability in MinIO's Snowball auto-extract handler (`PutObjectExtractHandler`) allows any user w
- 7.1 High severity
minio: Improper Authentication
MinIO is a high-performance object storage system. Prior to version RELEASE.2026-03-26T21-24-40Z, a flaw in extractMetadataFromMime() allows any authenticated user with s3:PutObject permission to inject internal server-side encryption metadata into objects by
- 7.5 High severity
minio: Observable Response Discrepancy
MinIO is a high-performance object storage system. Prior to RELEASE.2026-03-17T21-25-16Z, MinIO AIStor's STS (Security Token Service) AssumeRoleWithLDAPIdentity endpoint is vulnerable to LDAP credential brute-forcing due to two combined weaknesses: (1) disting
- 9.8 Critical severity
minio: Improper Authentication
MinIO is a high-performance object storage system. From RELEASE.2022-11-08T05-27-07Z to before RELEASE.2026-03-17T21-25-16Z, a JWT algorithm confusion vulnerability in MinIO's OpenID Connect authentication allows an attacker who knows the OIDC ClientSecret to
- 8.1 High severity
minio: Incorrect Authorization
MinIO is a high-performance object storage system. In all versions prior to RELEASE.2025-10-15T17-29-55Z, a privilege escalation vulnerability allows service accounts and STS (Security Token Service) accounts with restricted session policies to bypass their in
- 8.7 High severity
MinIO Java SDK is a Simple Storage Service (aka S3) client to perform bucket and object…
MinIO Java SDK is a Simple Storage Service (aka S3) client to perform bucket and object operations to any Amazon S3 compatible object storage service. In minio-java versions prior to 8.6.0, XML tag values containing references to system properties or environme
- 8.7 High severity
minio: Improper Verification of Cryptographic Signature
MinIO is a High Performance Object Storage released under GNU Affero General Public License v3.0. The signature component of the authorization may be invalid, which would mean that as a client you can use any arbitrary secret to upload objects given the user a
- 9.3 Critical severity
minio: Improper Privilege Management
MinIO is a high-performance, S3 compatible object store, open sourced under GNU AGPLv3 license. Minio is subject to a privilege escalation in IAM import API, all users are impacted since MinIO commit `580d9db85e04f1b63cc2909af50f0ed08afa965f`. This issue has b
- 8.8 High severity
minio: Improper Privilege Management
MinIO is a High Performance Object Storage. When someone creates an access key, it inherits the permissions of the parent key. Not only for `s3:*` actions, but also `admin:*` actions. Which means unless somewhere above in the access-key hierarchy, the `admin`
- 8.8 High severity
MinIO Security Feature Bypass Exploited
Minio is a Multi-Cloud Object Storage framework. Prior to RELEASE.2023-03-20T20-16-18Z, an attacker can use crafted requests to bypass metadata bucket name checking and put an object into any bucket while processing `PostPolicyBucket`. To carry out this attack
- 8.8 High severity
minio: Exposure of Resource to Wrong Sphere
Minio is a Multi-Cloud Object Storage framework. All users on Windows prior to version RELEASE.2023-03-20T20-16-18Z are impacted. MinIO fails to filter the `\` character, which allows for arbitrary object placement across buckets. As a result, a user with low
- 7.5 High severity
MinIO Information Disclosure Exploited
Minio is a Multi-Cloud Object Storage framework. In a cluster deployment starting with RELEASE.2019-12-17T23-16-33Z and prior to RELEASE.2023-03-20T20-16-18Z, MinIO returns all environment variables, including `MINIO_SECRET_KEY` and `MINIO_ROOT_PASSWORD`, resu
- 8.8 High severity
minio: Improper Preservation of Permissions
Minio is a Multi-Cloud Object Storage framework. Affected versions do not correctly honor a `Deny` policy on ByPassGoverance. Ideally, minio should return "Access Denied" to all users attempting to DELETE a versionId with the special header `X-Amz-Bypass-Gover
- 7.5 High severity
minio: Uncontrolled Resource Consumption
MinIO is a multi-cloud object storage solution. Starting with version RELEASE.2019-09-25T18-25-51Z and ending with version RELEASE.2022-06-02T02-11-04Z, MinIO is vulnerable to an unending go-routine buildup while keeping connections established due to HTTP cli
- 8.8 High severity
minio: Improper Privilege Management
MinIO is a High Performance Object Storage released under GNU Affero General Public License v3.0. A security issue was found where an non-admin user is able to create service accounts for root or other admin users and then is able to assume their access polici