TI-2026-60064 Aliases CVE-2026-88044 GHSA-p569-5gjg-9cmj

rclone: RC per-server auth-proxy bypass

HIGH 74CWE-863Published 2026-09-10 · Updated 2026-09-10

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.

Summary

rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.70.0 until 1.75.1, the serve/start RC interface accepts per-server proxyOpt.AuthProxy settings, and the FTP and S3 constructors in cmd/serve/ftp/ftp.go and cmd/serve/s3/server.go incorrectly check the process-global proxy.Opt.AuthProxy value instead. When the global value is empty, the request-local authentication proxy is ignored: FTP falls back to the fixed filesystem with username anonymous and any password, while S3 with AuthKey serves the fixed RC fs rather than the backend selected by the proxy. The dedicated command-line servers that configure the global option are not affected. This issue is fixed in version 1.75.1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00492 42nd percentileScored 2026-11-07

Fix Fixed rclone (rclone): 1.75.1github.com/rclone/rclone (Go): 1.75.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
rclone	rclone	1.70.0 to before 1.75.1	1.75.1	Patch available	CNA
—	github.com/rclone/rclone (Go)	1.70.0 to before 1.75.1	1.75.1	Patch available	GHSA-p569-5gjg-9cmj

rclone Vendorrclone Affected 1.70.0 to before 1.75.1 Fixed in 1.75.1 Patch available CNA
github.com/rclone/rclone (Go) Vendor— Affected 1.70.0 to before 1.75.1 Fixed in 1.75.1 Patch available GHSA-p569-5gjg-9cmj

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:rclone:rclone::::::::	—	—	rclone

cpe:2.3:a:rclone:rclone:*:*:*:*:*:*:*:* Versions — — ·rclone

Remediation

Fix · CNA rclone (rclone) Fixed in 1.75.1
Fix · GHSA-p569-5gjg-9cmj github.com/rclone/rclone (Go) Fixed in 1.75.1 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-88044
2026-10-03 Alias added: GHSA-p569-5gjg-9cmj

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-88044

Other 4

TI-2026-60044 rclone serve s3: --auth-proxy without --auth-key authenticates nobody - full SigV4 signature bypass CVSS 3.1CRITICAL 9.8
TI-2026-29802 RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution CVSS 4.0CRITICAL 9.2
TI-2026-29799 Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution CVSS 4.0CRITICAL 9.2
TI-2026-42602 Path traversal in rclone CVSS 3.1HIGH 8.8
TI-2026-60065 rclone: S3 multipart declared-length memory exhaustion CVSS 3.1HIGH 7.5
TI-2026-49967 rclone: Incomplete path validation allows backend root escape in serve restic CVSS 4.0HIGH 8.6

See all 43 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences