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.
Published: 2026-08-25
Score: 9.3 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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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'}

Subscriptions

Rclone Rclone
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
  • CWE-319

    Cleartext Transmission of Sensitive Information