Improper Verification of Cryptographic Signature Affecting github.com/minio/minio/cmd package, versions <RELEASE.2026-09-16T00-00-00Z
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMMINIOMINIOCMD-20158549
- published29 Sept 2026
- disclosed25 Sept 2026
- creditUnknown
Introduced: 25 Sep 2026
NewCVE-2026-97731 Â (opens in a new tab)How to fix?
Upgrade github.com/minio/minio/cmd to version RELEASE.2026-09-16T00-00-00Z or higher.
Overview
github.com/minio/minio/cmd is an open source object storage server compatible with Amazon S3 APIs.
Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature due to improper verification of x-amz-* headers in the request. An attacker can gain unauthorized read access to objects by adding the x-amz-copy-source header to a presigned PUT URL, causing the server to perform a copy operation as the signing key holder.