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CVE-2026-79778— rclone before v1.75.0 Denial of Service via TUS nil-response panic

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.

Rclone是Rclone团队开源的一款命令行云存储文件同步工具。 Rclone 1.75.0之前版本存在异常处理不当漏洞，该漏洞源于WebDAV TUS创建处理器在检查传输错误前解引用nil响应，恶意或受感染的端点可重置连接触发panic，终止未恢复的goroutine并停止长期运行进程中的无关工作，导致拒绝服务。

CVSS 5.3 · Medium EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
rclone rclone < 1.75.0 affected
1.75.0 unaffected
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I. Basic Information for CVE-2026-79778

Vulnerability Information
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Vulnerability Title
rclone before v1.75.0 Denial of Service via TUS nil-response panic
Source: CVE Program / CVE List V5
Vulnerability Description
rclone before v1.75.0 contains a denial of service vulnerability in the WebDAV TUS creation handler that dereferences a nil response before checking for transport errors. A malicious or compromised configured endpoint can reset connections during TUS uploads to trigger a panic that terminates unrecovered goroutines and halts unrelated work in long-lived processes.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5
Vulnerability Title
Rclone 异常处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rclone是Rclone团队开源的一款命令行云存储文件同步工具。 Rclone 1.75.0之前版本存在异常处理不当漏洞，该漏洞源于WebDAV TUS创建处理器在检查传输错误前解引用nil响应，恶意或受感染的端点可重置连接触发panic，终止未恢复的goroutine并停止长期运行进程中的无关工作，导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
rclone rclone 0 ~ 1.75.0 -

II. Public POCs for CVE-2026-79778

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III. Intelligence Information for CVE-2026-79778

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Vendor Advisories for CVE-2026-79778 (2)

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-2026-79776 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-2026-79782 3.1 LOW rclone before 1.74.4 Security Token Disclosure via HTTPS to HTTP Redirect
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-248

V. Comments for CVE-2026-79778

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