CVE-2026-10031

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 61/100
Published: 2026-07-30 Modified: 2026-10-29 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
AT: None
VC: Low
VI: Low
VA: None

Description

SFTPGo prior to 2.7.4 contains a permission bypass vulnerability that allows authenticated users to circumvent per-directory access controls by creating symbolic links in a permitted directory that point to files in directories where download, upload, or overwrite permissions are denied. Attackers can exploit the create_symlinks permission combined with read and write access in one directory to read or modify files in restricted directories, as operations are authorized against the link's directory permissions rather than the dereferenced target's directory permissions.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
drakkan SFTPGo 0 < 2.7.4
drakkan SFTPGo 0 < 2.7.4

Bug Bounty Relevance

61 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

5.3 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

EPSS — Exploitation Probability

0.19%
Raw Score 0.001900
Percentile 8.7%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00190
2026-10-28
0.00190

Intelligence Sources

mitre ref →
nvd ref →