CVE-2026-88018 rclone serve s3: --auth-proxy without --auth-key authenticates nobody - full SigV4 signature bypass

rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.1, rclone serve s3 configured with --auth-proxy but without --auth-key allows authPairMiddleware to register any client-chosen accessKeyID with an empty ws.s3Secret. gofakes...

CVE-2026-88018 rclone serve s3: --auth-proxy without --auth-key authenticates nobody - full SigV4 signature bypass

rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.1, rclone serve s3 configured with --auth-proxy but without --auth-key allows authPairMiddleware to register any client-chosen accessKeyID with an empty ws.s3Secret. gofakes...

PT-2026-89681

Summary In streamed multipart mode, serve s3 passes the request's declared part length to multipart.NewRW.ReservecontentLength before reading any part data. Reserve immediately obtains enough 1 MiB pool pages for the entire declared length. The request handler therefore allocates attacker-selecte...

CVE-2026-79781

rclone serve s3 before 1.74.4 contains a path traversal vulnerability that allows attackers to read and overwrite root-level files by using dot-dot segments in S3 object keys. Attackers can send requests with object keys like ../root-secret.txt to escape the bucket namespace and access files in t...

UBUNTU-CVE-2026-79781

rclone serve s3 before 1.74.4 contains a path traversal vulnerability that allows attackers to read and overwrite root-level files by using dot-dot segments in S3 object keys. Attackers can send requests with object keys like ../root-secret.txt to escape the bucket namespace and access files in t...

CVE-2026-79781 rclone serve s3 Path Traversal via dot-dot object keys

rclone serve s3 before 1.74.4 contains a path traversal vulnerability that allows attackers to read and overwrite root-level files by using dot-dot segments in S3 object keys. Attackers can send requests with object keys like ../root-secret.txt to escape the bucket namespace and access files in t...

EUVD-2026-65539

rclone serve s3 before 1.74.4 contains a path traversal vulnerability that allows attackers to read and overwrite root-level files by using dot-dot segments in S3 object keys. Attackers can send requests with object keys like ../root-secret.txt to escape the bucket namespace and access files in t...

CVE-2026-79781

rclone serve s3 before version 1.74.4 contains a path traversal vulnerability in its handling of S3 object keys. An unauthenticated, network-based attacker can include dot-dot (../) segments in object key names (e.g., ../root-secret.txt) to escape the bucket namespace and read or overwrite files ...

CVE-2026-79781 rclone serve s3 Path Traversal via dot-dot object keys

rclone serve s3 before 1.74.4 contains a path traversal vulnerability that allows attackers to read and overwrite root-level files by using dot-dot segments in S3 object keys. Attackers can send requests with object keys like ../root-secret.txt to escape the bucket namespace and access files in t...

CVE-2026-79781

rclone serve s3 before 1.74.4 contains a path traversal vulnerability that allows attackers to read and overwrite root-level files by using dot-dot segments in S3 object keys. Attackers can send requests with object keys like ../root-secret.txt to escape the bucket namespace and access files in t...

PT-2026-81370

Name of the Vulnerable Software and Affected Versions rclone versions prior to 1.74.4 Description The serve s3 function contains a path traversal flaw. This allows attackers to read and overwrite root-level files by using dot-dot segments in S3 object keys. By sending requests with object keys su...