CVE-2026-71310

NameCVE-2026-71310
Descriptionrclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.0, the shared HTTP CONNECT helper in lib/proxy/http.go parses proxy CONNECT responses with http.ReadResponse over an unrestricted buffered reader, allowing a malicious or compromised configured proxy, or an active on-path actor controlling a plaintext HTTP proxy hop, to send oversized headers that grow memory until the rclone process fails. The affected helper is used by FTP and SFTP proxy connections, and SFTP reaches the parser before SSH server authentication, so target host key validation does not constrain a malicious proxy. This issue is fixed in 1.75.0.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
rclone (PTS)bullseye1.53.3-1vulnerable
bookworm1.60.1+dfsg-2vulnerable
trixie1.60.1+dfsg-4vulnerable
sid1.69.3+dfsg-3vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
rclonesource(unstable)(unfixed)

Notes

https://github.com/rclone/rclone/security/advisories/GHSA-xhf4-832v-7xcr
Fixed by: https://github.com/rclone/rclone/commit/21d8cd3b92cd81d987f485051d454ea675d91a2b (v1.75.0)

Search for package or bug name: Reporting problems