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CVE-2026-79782— rclone before 1.74.4 Security Token Disclosure via HTTPS to HTTP Redirect

Quick assessment

Affected
rclone rclone
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 rclone 1.74.4 之前的版本中，当 S3 重定向将同一主机上的协议从 HTTPS 更改为 HTTP 时，未能移除 X-Amz-Security-Token 请求头。攻击者可以拦截明文 HTTP 流量，从而捕获在请求头中发送的 AWS STS 会话令牌。

CVSS 3.1 · Low EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 2

VendorProduct Version RangeStatus
rclone rclone < 1.74.4 affected
1.74.4 unaffected
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I. Basic Information for CVE-2026-79782

Vulnerability Information
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Vulnerability Title
rclone before 1.74.4 Security Token Disclosure via HTTPS to HTTP Redirect
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的明文传输
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
rclone rclone 0 ~ 1.74.4 -

II. Public POCs for CVE-2026-79782

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III. Intelligence Information for CVE-2026-79782

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Vendor Advisories for CVE-2026-79782 (1)

Other References for CVE-2026-79782 (1)

Same Patch Batch · rclone · 2026-08-25 · 9 CVEs total

CVE-2026-79781 6.5 MEDIUM rclone serve s3 Path Traversal via dot-dot object keys
CVE-2026-79775 6.5 MEDIUM rclone Archive Backend SquashFS Parser Denial of Service
CVE-2026-79780 5.3 MEDIUM rclone before v1.75.0 Credential Exposure via S3 Redirect
CVE-2026-79779 5.3 MEDIUM rclone before v1.75.0 WebDAV Credential Exposure via HTTPS-to-HTTP Redirect
CVE-2026-79778 5.3 MEDIUM rclone before v1.75.0 Denial of Service via TUS nil-response panic
CVE-2026-79776 5.3 MEDIUM rclone before 1.75.0 Authentication Bypass via pprof
CVE-2026-79783 3.6 LOW rclone before 1.74.4 Privilege Escalation via setuid Metadata
CVE-2026-79777 2.7 LOW rclone before v1.75.0 Information Disclosure via RC API

IV. Related Vulnerabilities

Same product: rclone
Same vendor: rclone
Same weakness: CWE-319

V. Comments for CVE-2026-79782

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