Improper Verification of Cryptographic Signature

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...

UBUNTU-CVE-2026-71191

In OpenStack Swift through 2.38.0, S3API middleware does not enforce that semantic x-amz- headers are covered by the SigV4 signature on presigned URL requests. An attacker who obtains a presigned PUT URL can inject an unsigned X-Amz-Copy-Source header, causing Swift to perform a server-side copy...

CVE-2026-71191

OpenStack Swift (through 2.38.0) is affected by a vulnerability in the S3API middleware where presigned URL requests do not ensure that semantic x-amz-* headers are covered by the SigV4 signature. An attacker with a presigned PUT URL can inject an unsigned X-Amz-Copy-Source header, triggering a s...

CVE-2026-71191

In OpenStack Swift through 2.38.0, S3API middleware does not enforce that semantic x-amz- headers are covered by the SigV4 signature on presigned URL requests. An attacker who obtains a presigned PUT URL can inject an unsigned X-Amz-Copy-Source header, causing Swift to perform a server-side copy...

Linux Distros Unpatched Vulnerability : CVE-2026-71191

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In OpenStack Swift through 2.38.0, S3API middleware does not enforce that semantic x-amz- headers are covered by the SigV4 signature on presigned URL requests. ...

CVE-2026-50137 Budibase: POST /api/attachments/:datasourceId/url is unauthenticated and lets anonymous callers mint S3 PUT pre-signed URLs using stored datasource IAM credentials

Budibase is an open-source low-code platform. Prior to 3.39.0, an anonymous attacker who knows or can enumerate a workspace id app... and an S3-source datasource id ds... can call this endpoint with no auth and obtain a 15-minute pre-signed PUT URL minted on the victim's IAM identity. The endpoin...