CVE-2026-49991

RustFS is a distributed object storage system built in Rust. In 1.0.0-beta.4, authenticated users with only PutObject permission on their own bucket can exploit a path traversal vulnerability in the Snowball auto-extract feature to write arbitrary objects into other users' buckets, completely...

CVE-2026-49991 RustFS Snowball Auto-Extract: Path Traversal allows cross-bucket object injection

RustFS is a distributed object storage system built in Rust. In 1.0.0-beta.4, authenticated users with only PutObject permission on their own bucket can exploit a path traversal vulnerability in the Snowball auto-extract feature to write arbitrary objects into other users' buckets, completely...

CVE-2026-49991

RustFS is a distributed object storage system built in Rust. In 1.0.0-beta.4, authenticated users with only PutObject permission on their own bucket can exploit a path traversal vulnerability in the Snowball auto-extract feature to write arbitrary objects into other users' buckets, completely...

PT-2026-52909

Name of the Vulnerable Software and Affected Versions RustFS version 1.0.0-beta.4 Description Authenticated users with PutObject permission on their own bucket can exploit a path traversal issue in the Snowball auto-extract feature to write arbitrary objects into buckets belonging to other users,...

Authentication Bypass

MinIO is vulnerable to Authentication Bypass. The vulnerability is due to missing signature verification for authTypeStreamingUnsignedTrailer requests in the Snowball auto-extract handler, which allows an attacker with knowledge of a valid access key to upload arbitrary objects without providing ...

CVE-2026-40344 MinIO has an Unauthenticated Object Write via Missing Signature Verification in Unsigned-Trailer Uploads

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 who knows a valid access key to write...

CVE-2026-40344 MinIO has an Unauthenticated Object Write via Missing Signature Verification in Unsigned-Trailer Uploads

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 who knows a valid access key to write...

CVE-2026-40344

MinIO is affected by an authentication bypass in the Snowball auto-extract handler (PutObjectExtractHandler) prior to RELEASE.2026-04-11T03:20:12Z. An attacker with a valid access key (including the default minioadmin or any key with WRITE on a bucket) can write arbitrary objects to any bucket wi...