SFTPGo has path confinement bypass in public browsable share partial ZIP download

TRUNG BÌNH 5.9CVE-2026-49244 · GHSA-h64p-8h4r-6gfh · GO-2026-5902 · Công bố 20/08/2026 · cập nhật 18/10/2026

Tóm tắt nhanh

CVE-2026-49244 là lỗ hổng mức TRUNG BÌNH (CVSS 5.9) ảnh hưởng github.com/drakkan/sftpgo, github.com/drakkan/sftpgo/v2.
Xác suất bị khai thác trong 30 ngày tới (EPSS): 0.45%, cao hơn 38.9% các lỗ hổng khác.
Cách xử lý: cập nhật lên 2.7.3 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
github.com/drakkan/sftpgo Go	`mọi phiên bản`	Chưa có bản vá
github.com/drakkan/sftpgo/v2 Go	`≥ 2.2.0, < 2.7.3`	`2.7.3`

Mô tả

Summary

The public web-client endpoint for partial ZIP downloads of a browsable share did not correctly confine the client-supplied files entries to the shared directory. A requester able to reach a public share could read files located outside the shared directory, as long as the target's canonical path begins with the shared directory's name.

Patches

Fixed in v2.7.3. The fix replaces the raw prefix check with a directory-boundary–aware check.

Mô tả của NVD

SFTPGo is an open source, event-driven file transfer solution. From 2.2.0 until 2.7.3, the public web-client partial ZIP download endpoint for a browsable share validates client-supplied files entries with a raw byte-prefix comparison rather than a directory-boundary-aware check. An unauthenticated requester who can reach a public share can select a canonical path outside the shared directory when the target path begins with the shared directory's name, such as a sibling path that shares the same prefix. The endpoint then includes the out-of-scope file in the generated download, disclosing its contents. This issue is fixed in version 2.7.3.