CVE-2026-88018Critical· 9.8▾ AbyssalPoC availablerclone 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 …
▾ Abyssal zone — Critical with a public exploit or in-the-wild use
impact 53.9 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 11.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.5%
Last analysed / modified upstream
0.5% → 0.5%
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. gofakes3 then verifies the request’s SigV4 signature against that same empty secret, while Server.auth passes the access key identifier as both the user and authentication value to the proxy without an independent per-identity secret. An unauthenticated network attacker can therefore choose an arbitrary access key, sign with an empty secret, and reach whatever backend the auth-proxy script resolves for that identity. This issue is fixed in version 1.75.1.
rclone < 1.75.1Upgrade past the affected range:
rclone 1.75.1Affected packages:
github.com/rclone/rclone < 1.75.1Patched in:
github.com/rclone/rclone 1.75.1Source: https://osv.dev/vulnerability/GHSA-xwwr-4h3p-r22c
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-88044Critical· 9.1rclone is a command-line program to sync files and directories to and from different cloud storage providers
CVE-2026-88015Medium· 5.3rclone is a command-line program to sync files and directories to and from different cloud storage providers
CVE-2026-88016High· 7.1rclone is a command-line program to sync files and directories to and from different cloud storage providers
CVE-2026-88017High· 7.3rclone is a command-line program to sync files and directories to and from different cloud storage providers
CVE-2026-88013Low· 3.7rclone is a command-line program to sync files and directories to and from different cloud storage providers
CVE-2026-88045High· 7.5rclone is a command-line program to sync files and directories to and from different cloud storage providers