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CVE-2026-88015— rclone local: crafted Range request against a translated symlink panics (DoS)

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.

以下是该漏洞描述的中文翻译： rclone 是一个用于在不同云存储提供商之间同步文件和目录的命令行工具。 在 1.75.1 之前，当使用 或 参数配置本地后端（backend/local）时，符号链接的目标会被暴露为 对象。在此配置下， 会将一个未经校验的正数 Range 起始偏移量直接传递给 和 函数。该函数会执行 对目标字符串进行切片操作；当 Range 的起始偏移量大于目标字符串的长度时，会导致确定性的“切片越界”恐慌（slice-bounds panic）。当通过 以 HTTP 或 WebDAV 方式暴露该

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1018 · Remote System Discovery
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I. Basic Information for CVE-2026-88015

Vulnerability Information
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Vulnerability Title
rclone local: crafted Range request against a translated symlink panics (DoS)
Source: CVE Program / CVE List V5
Vulnerability Description
rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.1, backend/local with --links or links=true exposes symlink targets as .rclonelink objects, and fs.RangeOption.Decode can pass an unchecked positive Range start through Object.Open and openTranslatedLink. The function slices the target string as linkdst[offset:], so a Range start larger than the target length causes a deterministic slice-bounds panic when lib/http/serve exposes the object through HTTP or WebDAV. Go net/http normally recovers the panic per connection, causing request-level denial of service rather than terminating the entire process. This issue is fixed in version 1.75.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
rclone rclone < 1.75.1 -

II. Public POCs for CVE-2026-88015

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III. Intelligence Information for CVE-2026-88015

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Other References for CVE-2026-88015 (2)

Same Patch Batch · rclone · 2026-09-10 · 9 CVEs total

CVE-2026-88018 9.8 CRITICAL rclone serve s3: --auth-proxy without --auth-key authenticates nobody - full SigV4 signatu
CVE-2026-88044 9.1 CRITICAL rclone: RC per-server auth-proxy bypass
CVE-2026-88045 7.5 HIGH rclone: S3 multipart declared-length memory exhaustion
CVE-2026-88017 7.3 HIGH rclone: FTP cross-session auth-proxy backend confusion
CVE-2026-88016 7.1 HIGH rclone: Directory metadata (chmod/chown/chtimes) applied through a planted symlink in rclo
CVE-2026-88014 6.3 MEDIUM rclone archive/zip: Zip Slip via unsanitized zip entry names lets a malicious archive esca
CVE-2026-88046 5.3 MEDIUM rclone: source object names can escape the configured root on upload
CVE-2026-88013 3.7 LOW rclone: http backend forwards custom/auth headers to a different host on redirect

IV. Related Vulnerabilities

Same product: rclone
Same vendor: rclone
Same weakness: CWE-190

V. Comments for CVE-2026-88015

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