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Vulnerabilities

Vulnerability · CVE-2026-41145

MinIO is a high-performance object storage system.

Published Apr 22, 2026 · catalog updated Jun 17, 2026 · MinIO is a high-performance

Check if you run it

No confirmed exploitation is on record for CVE-2026-41145. EPSS is 0.60%. Act only if a listed version of MinIO is a high-performance is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (MinIO is a high-performance).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.60%
Remediation
Advisory link
Affected products
cpe minio/minio

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 code path allows any user who knows a valid access key to write arbitrary objects to any bucket without knowing the secret key or providing a valid cryptographic signature. Any MinIO deployment is impacted. The attack requires only a valid access key (the well-known default , or any key with WRITE permission on a bucket) and a target bucket name. and call with a signature verification gate based solely on the presence of the header. Meanwhile, extracts credentials from either the header or the query parameter, and trusts whichever it finds. An attacker omits the header and supplies credentials exclusively via the query string. The signature gate evaluates to , is never called, and the request proceeds with the permissions of the impersonated access key. This affects (standard and tables/warehouse bucket paths) and (multipart uploads). Users of the open-source project should upgrade to MinIO AIStor or later. If upgrading is not immediately possible, block unsigned-trailer requests at the load balancer. Reject any request containing at the reverse proxy or WAF layer. Clients can use (the signed variant) instead. Alternatively, restrict WRITE permissions. Limit grants to trusted principals. While this reduces the attack surface, it does not eliminate the vulnerability since any user with WRITE permission can exploit it with only their access key.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe minio/minioversion unspecified

How to fix CVE-2026-41145

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-41145. EPSS is 0.60%. Act only if a listed version of MinIO is a high-performance is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-287: Improper Authentication. EPSS 0.60%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 22, 2026 · NIST NVD

    Detected

    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 code path allows any user who knows a valid access key to write arbitrary objects to any bucket without knowing the secret key or providing a valid cryptographic signature. Any MinIO deployment is impacted. The atta

  2. Jun 17, 2026 · NIST NVD

    Updated

    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 code path allows any user who knows a valid access key to write arbitrary objects to any bucket without knowing the secret key or providing a valid cryptographic signature. Any MinIO deployment is impacted. The atta

Sources

  • CVE.orgVulnerability recordCVE-2026-41145

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-41145

    30-day exploitation probability 0.6%

    first.org
  • NIST NVDVulnerability recordCVE-2026-41145

    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 code path allows any user who knows a valid access key to

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.