rclone before 1.74.4 fails to strip the X-Amz-Security-Token header when an S3 redirect changes scheme from HTTPS to HTTP on the same host. Attackers can intercept plaintext HTTP traffic to capture AWS STS session tokens sent in request headers.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Adjacent Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Rclone Subscribe
Rclone Subscribe

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/rclone/rclone/security/advisories/GHSA-gx4c-2hqx-cw2r cve-icon cve-icon
https://www.vulncheck.com/advisories/rclone-before-security-token-disclosure-via-https-to-http-redirect cve-icon cve-icon
History

Tue, 25 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Description rclone before 1.74.4 fails to strip the X-Amz-Security-Token header when an S3 redirect changes scheme from HTTPS to HTTP on the same host. Attackers can intercept plaintext HTTP traffic to capture AWS STS session tokens sent in request headers.
Title rclone before 1.74.4 Security Token Disclosure via HTTPS to HTTP Redirect
First Time appeared Rclone
Rclone rclone
Weaknesses CWE-319
CPEs cpe:2.3:a:rclone:rclone:*:*:*:*:*:*:*:*
Vendors & Products Rclone
Rclone rclone
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-25T15:16:11.136Z

Reserved: 2026-08-25T14:32:37.762Z

Link: CVE-2026-79782

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-25T16:17:30.217

Modified: 2026-08-25T16:17:30.217

Link: CVE-2026-79782

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses