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CVE-2026-103028— SFTPGo source-side file-pattern filter bypass during copy operations

Quick assessment

Affected
drakkan sftpgo
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.

SFTPGo 是一个开源的、事件驱动的解决方案，用于文件传输。从 2.5.0 到 2.7.6 版本中，一个具有复制权限的经过身份验证的用户，可以将被 拒绝或在 范围之外的源文件复制到被允许的目的地，因为文件模式过滤器仅在目标端进行评估。随后，该用户可以读取这些被拒绝的文件的內容。递归目录复制可以在允许的路径下重现受限制的内容，并且 策略也被绕过，因为即使某些文件在 命令和目录列表中被显示为缺失，仍然可以被复制。不过，家目录边界、虚拟文件夹布局、按目录设置的权限、对其他账户的访问权限以及管理授权仍然受到严格限制。此问

CVSS 4.3 · Medium EPSS 0.22% · P11

Affected Version Matrix 1

VendorProduct Version RangeStatus
drakkan sftpgo >= 2.5.0, < 2.7.6 affected
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I. Basic Information for CVE-2026-103028

Vulnerability Information
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Vulnerability Title
SFTPGo source-side file-pattern filter bypass during copy operations
Source: CVE Program / CVE List V5
Vulnerability Description
SFTPGo is an open source, event-driven file transfer solution. From 2.5.0 until 2.7.6, an authenticated user with copy permission can copy a source file denied by denied_patterns or outside allowed_patterns to an allowed destination name because file-pattern filters are evaluated only on the destination. The user can then read the denied file contents. Recursive directory copies can reproduce restricted contents under an allowed path, and the hide policy is bypassed because files that appear missing to stat and directory listings can still be copied. Home-directory boundaries, virtual-folder layout, per-directory permissions, access to other accounts, and administrative authorization remain enforced. This issue is fixed in 2.7.6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
drakkan sftpgo >= 2.5.0, < 2.7.6 -

II. Public POCs for CVE-2026-103028

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III. Intelligence Information for CVE-2026-103028

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Patches & Fixes for CVE-2026-103028 (1)

Vendor Advisories for CVE-2026-103028 (1)

IV. Related Vulnerabilities

Same product: sftpgo
Same vendor: drakkan
Same weakness: CWE-863

V. Comments for CVE-2026-103028

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