Medium 5.9Published Aug 5, 2026

CVE-2026-71310rclone: Unbounded HTTP CONNECT Response Headers Can Exhaust rclone Memory

Updated under an hour ago (2026-10-19 08:30 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for rclone

Exploited in the last 30 days

rclone 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.

CVSS: 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-400, CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Aug 31, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

rclone rclone rclone:rclone (from the name)	before 1.75.0	CNA record

References

https://github.com/rclone/rclone/security/advisories/GHSA-xhf4-832v-7xcrx-refsource-confirm
https://github.com/rclone/rclone/commit/21d8cd3b92cd81d987f485051d454ea675d91a2bx-refsource-misc
https://github.com/rclone/rclone/releases/tag/v1.75.0x-refsource-misc
https://pkg.go.dev/vuln/GO-2026-6199x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.